USB audio interface crackles on linux

[bedHedd]

KVM Model:

USB-C KVM Switch v3 (with USB Power Delivery / 135watts

USB-C KVM Switch v3 (with USB Power Delivery / 135watts) — Level1Techs Store

USB Interface (5-gigabit or 10-gigbit):

not sure, it is the usb c combiner

---

Problem:

Audio from my usb interface is crackly on Fedora 41. When I replay the same sounds from my mac or from my phone connecting to the interface directly, I don’t get the crackle.

I am not sure if the issue is with the combiner or the KVM
here’s how I have the setup.

Other Notes:

Configurations

I’ve tried the following configurations

Input	Result
PC-> combiner → KVM	Crackling occurs
Windows Laptop → USB C Switch → KVM	Crackling occurs
PC → combiner → USB C Switch	USB Devices not detected
PC → combiner → USB C Switch → KVM	USB Devices not detected
PC → combiner → Monitor USB C input	No issues
mac → USB C switch-> KVM	No issues, mouse not detected on front HID port

Further debugging notes

I used the out of the box settings, switching between the two switch settings doesn’t reduce the crackling. Nothing happened when I changed the usb c combiner either

I don’t think it is the usb c cable either because when my interface was plugged into the monitor, it didn’t have the crackling. On my rtx 2070, the crackling didn’t have any issues with the usb c switch either

L1 USB C combiner

I recently upgraded to a powercolor 7900 XTX Hellhound, but it doesn’t have USB C displayport alt mode. I can’t find any documentation online of which displayport has dp alt mode. Would this work with my existing bidirectional USB C cable (it worked with my USB C switch and RTX 2070) My monitor is a Dell U4320Q (4K 60 HZ). Here’s how I would con…

[Level1_Amber]

Oh nooo I’m so sorry you’re having trouble D:

@bedHedd

PC → combiner → USB C Switch → KVM

What is the USBC switch you’re describing here? Also, do you have the spare power plugged into the combiner? Try putting the back switch into U3 mode for more bandwidth to the USBs…? Idk maybe the Presonus is a bandwidth hog…

@wendell any idea why audio would be crackling in a digital setup?

[bedHedd]

@Level1_Amber

What is the USBC switch you’re describing here?

https://www.amazon.com/gp/aw/d/B09MQ4N8KM?psc=1

@Level1_Amber

Also, do you have the spare power plugged into the combiner?

Nope, just the USB b input

@Level1_Amber

Try putting the back switch into U3 mode for more bandwidth to the USBs…?

From the KVM side? Or both KVM and combiner? It seems to be a issue when the cable doesn’t go directly to the monitor’s USB C input

@Level1_Amber

Idk maybe the Presonus is a bandwidth hog…

Possible as it is a mic, instrument, and speaker interface

@Level1_Amber

@wendell any idea why audio would be crackling in a digital setup?

I have no idea because this only occurs on my Linux desktop and windows laptop (when it is connected to the switch), but doesn’t happen with my macbook or when I connect my windows laptop directly to the kvm.

[Level1_Amber]

@bedHedd

Audio from my usb interface is crackly on Fedora 41.

Wendell said to try raising your USB pollling rate.

@bedHedd

Nope, just the USB b input

I would definitely connect the spare power.

@bedHedd

From the KVM side? Or both KVM and combiner?

On the KVM, it working PC → Combiner → Monitor makes me inclined to say the combiner’s setting is correct

[bedHedd]

@Level1_Amber

Wendell said to try raising your USB pollling rate.

Will look it up

@Level1_Amber

I would definitely connect the spare power.

OK

@Level1_Amber

On the KVM, it working PC → Combiner → Monitor makes me inclined to say the combiner’s setting is correct

Checking

[bedHedd]

@Level1_Amber

I would definitely connect the spare power.

done

@Level1_Amber

Wendell said to try raising your USB pollling rate.

@bedHedd

Will look it up

looked up how to check usb polling rates from
https://openterprise.it/2019/03/linux-increase-usb-mouse-pooling/

how do I change it @wendell?

sudo cat /sys/kernel/debug/usb/devices output

sudo cat /sys/kernel/debug/usb/devices
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh=10
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso= 12
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 6.12
S:  Manufacturer=Linux 6.12.9-200.fc41.x86_64 xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:03:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=3434 ProdID=0b10 Rev= 1.00
S:  Manufacturer=Keychron
S:  Product=Keychron Q1 HE
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=  32 Ivl=1ms
E:  Ad=02(O) Atr=03(Int.) MxPS=  32 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=83(I) Atr=03(Int.) MxPS=  32 Ivl=1ms

T:  Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 24 Spd=480  MxCh= 4
D:  Ver= 2.10 Cls=09(hub  ) Sub=00 Prot=02 MxPS=64 #Cfgs=  1
P:  Vendor=05e3 ProdID=0610 Rev=93.07
S:  Manufacturer=GenesysLogic
S:  Product=USB2.1 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=01 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=256ms
I:* If#= 0 Alt= 1 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=02 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=256ms

T:  Bus=01 Lev=02 Prnt=24 Port=00 Cnt=01 Dev#= 25 Spd=12   MxCh= 7
D:  Ver= 1.01 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=09ea ProdID=0130 Rev= 0.12
S:  Manufacturer=Generic
S:  Product=Virtual HUB
S:  SerialNumber=00000002
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=255ms

T:  Bus=01 Lev=03 Prnt=25 Port=00 Cnt=01 Dev#= 27 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0d8c ProdID=0016 Rev= 1.00
S:  Manufacturer=C-Media Electronics Inc.
S:  Product=USB Audio Device
C:* #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=01(O) Atr=09(Isoc) MxPS= 192 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=82(I) Atr=0d(Isoc) MxPS= 192 Ivl=1ms
I:* If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=87(I) Atr=03(Int.) MxPS=   4 Ivl=2ms

T:  Bus=01 Lev=03 Prnt=25 Port=01 Cnt=02 Dev#= 29 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=3434 ProdID=0220 Rev= 1.00
S:  Manufacturer=Keychron
S:  Product=Keychron K2 Pro
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=  32 Ivl=1ms
E:  Ad=03(O) Atr=03(Int.) MxPS=  32 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=84(I) Atr=03(Int.) MxPS=  32 Ivl=1ms

T:  Bus=01 Lev=03 Prnt=25 Port=05 Cnt=03 Dev#= 30 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=09eb ProdID=0131 Rev= 0.02
S:  Manufacturer=Generic
S:  Product=Virtual HID
S:  SerialNumber=00000002
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr=  2mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=1ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=   5 Ivl=10ms

T:  Bus=01 Lev=02 Prnt=24 Port=01 Cnt=02 Dev#= 26 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=32 #Cfgs=  1
P:  Vendor=046d ProdID=c52b Rev=24.11
S:  Manufacturer=Logitech
S:  Product=USB Receiver
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr= 98mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=8ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=   8 Ivl=2ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=83(I) Atr=03(Int.) MxPS=  32 Ivl=2ms

T:  Bus=01 Lev=02 Prnt=24 Port=03 Cnt=03 Dev#= 28 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=194f ProdID=0109 Rev= 1.17
S:  Manufacturer=PreSonus
S:  Product=Studio 24c
S:  SerialNumber=SC1E21474611
C:* #Ifs= 6 Cfg#= 1 Atr=80 MxPwr=500mA
A:  FirstIf#= 0 IfCount= 3 Cls=01(audio) Sub=00 Prot=20
I:* If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=20 Driver=snd-usb-audio
I:* If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
I:  If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
E:  Ad=81(I) Atr=05(Isoc) MxPS= 200 Ivl=125us
I:* If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
I:  If#= 2 Alt= 1 #EPs= 2 Cls=01(audio) Sub=02 Prot=20 Driver=snd-usb-audio
E:  Ad=01(O) Atr=05(Isoc) MxPS= 200 Ivl=125us
E:  Ad=82(I) Atr=11(Isoc) MxPS=   4 Ivl=1ms
I:* If#= 3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:* If#= 4 Alt= 0 #EPs= 2 Cls=01(audio) Sub=03 Prot=00 Driver=snd-usb-audio
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=02 Driver=(none)

T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=03 Dev#=  4 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=32 #Cfgs=  1
P:  Vendor=046d ProdID=c52b Rev=24.11
S:  Manufacturer=Logitech
S:  Product=USB Receiver
C:* #Ifs= 3 Cfg#= 1 Atr=a0 MxPwr= 98mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=usbhid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=8ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=usbhid
E:  Ad=82(I) Atr=03(Int.) MxPS=   8 Ivl=2ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=83(I) Atr=03(Int.) MxPS=  32 Ivl=2ms

T:  Bus=01 Lev=01 Prnt=01 Port=04 Cnt=04 Dev#=  6 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=058f ProdID=6364 Rev= 1.00
S:  Manufacturer=Generic
S:  Product=Mass Storage Device
S:  SerialNumber=058F63646476
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=250mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=64ms

T:  Bus=01 Lev=01 Prnt=01 Port=07 Cnt=05 Dev#=  8 Spd=12   MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs=  1
P:  Vendor=0d8c ProdID=0005 Rev= 1.00
S:  Manufacturer=BLUE MICROPHONE
S:  Product=Blue Snowball
S:  SerialNumber=201509
C:* #Ifs= 3 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:  If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 1 Alt= 1 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=82(I) Atr=0d(Isoc) MxPS= 100 Ivl=1ms
I:* If#= 1 Alt= 2 #EPs= 1 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
E:  Ad=82(I) Atr=0d(Isoc) MxPS= 200 Ivl=1ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=usbhid
E:  Ad=87(I) Atr=03(Int.) MxPS=  16 Ivl=2ms

T:  Bus=01 Lev=01 Prnt=01 Port=09 Cnt=06 Dev#= 10 Spd=12   MxCh= 0
D:  Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=8087 ProdID=0a2b Rev= 0.01
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms
I:  If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   9 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   9 Ivl=1ms
I:  If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  17 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  17 Ivl=1ms
I:  If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  25 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  25 Ivl=1ms
I:  If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  33 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  33 Ivl=1ms
I:  If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=  49 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=  49 Ivl=1ms

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=10000 MxCh= 4
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 3.10 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
P:  Vendor=1d6b ProdID=0003 Rev= 6.12
S:  Manufacturer=Linux 6.12.9-200.fc41.x86_64 xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:03:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=03 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 4
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 6.12
S:  Manufacturer=Linux 6.12.9-200.fc41.x86_64 xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:2a:00.3
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=04 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=10000 MxCh= 4
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 3.10 Cls=09(hub  ) Sub=00 Prot=03 MxPS= 9 #Cfgs=  1
P:  Vendor=1d6b ProdID=0003 Rev= 6.12
S:  Manufacturer=Linux 6.12.9-200.fc41.x86_64 xhci-hcd
S:  Product=xHCI Host Controller
S:  SerialNumber=0000:2a:00.3
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=04 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  3 Spd=5000 MxCh= 0
D:  Ver= 3.20 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 9 #Cfgs=  1
P:  Vendor=0bc2 ProdID=2038 Rev=18.02
S:  Manufacturer=Seagate
S:  Product=Expansion HDD
S:  SerialNumber=00000000NT17HLF4
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  8mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=uas
E:  Ad=81(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms
I:* If#= 0 Alt= 1 #EPs= 4 Cls=08(stor.) Sub=06 Prot=62 Driver=uas
E:  Ad=01(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E:  Ad=83(I) Atr=02(Bulk) MxPS=1024 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS=1024 Ivl=0ms

systool -avm usbhid
Module = "usbhid"

  Attributes:
    uevent              = <store method only>

  Parameters:
    ignoreled           = "0"
    jspoll              = "0"
    kbpoll              = "0"
    mousepoll           = "0"
    quirks              = "(null),(null),(null),(null)"

This just has it for mouse/keyboard/joysticks

Modifying the polling rate of usb devices

[bedHedd]

@Level1_Amber

Try putting the back switch into U3 mode for more bandwidth to the USBs…? Idk maybe the Presonus is a bandwidth hog…

This causes my screen and USB to cut out on my mac and didn’t fix the crackling issues

[Level1_Amber]

I would email “wendell at level1techs dot com” for more support. I’m not sure what the issue is here.

[bedHedd]

@Level1_Amber

“wendell at level1techs dot com”

dang even mods don’t get around the link rule. I’ll draft up a email. Can I cc you?

[Level1_Amber]

Oh no no we just do that so if someone scrapes the website they don’t just get wendell’s full email. Also yes of course my email is just “amber @ level1techs dot com”

[bedHedd]

@Level1_Amber it’s been a while, but after going back and forth with Wendell over email, I’m starting to suspect my 10ft USB C cable is the issue, as my USB keyboard and audio interface are disconnecting more frequently compared to my laptops (which have shorter cable runs).
https://www.amazon.com/gp/aw/d/B0874HH4ZZ?psc=1

If I were to get this cable, would it work with the USB C combiner and the KVM?

Club 3D | USB 3.2 Gen2 Type C to C Active Bi-directional Cable 8K60Hz M/M...

Amazon.com: Club 3D CAC-1535 USB Gen 2 Type C to Type C Bi-Directional Cable...

The page has the following

The Club 3D CAC-1535 is an USB Type C to USB Type C Bi-directional Active Cable with a Re-timer chipset for enhancing Video, Data and Power that reaches up to 5 meters / 16.40ft . For video its compatible with DP1.4 standards with a theoretical resolution of up to 8K@60Hz. For data it is compatible with USB3.2 Gen 2 with a maximum of 10Gbps of data transmission and for power it is capable of delivering a max of 60W (20V/3A) PD Charging.

This cable combines video,data and power functions for connecting USB Type C PC or mobile device to a USB Type C display/VR/HardDrive/
Dock/PD charger. In addition this cable is bidirectional which makes it
simple to use. Please make sure that the devices connected support DisplayPort™ Alt Mode Functions.

Note: It works with devices that support DisplayPort Alt mode 1.4, its downwards compatible, specification is limited to devices capability.

[Level1_Amber]

I would recommend a higher bandwidth option like this (it’s also cheaper for some reason?):

Amazon.com: Club 3D CAC-1570 USB 80Gbps Certified 240W 8K 240Hz Type-C® 1.2m /...

[bedHedd]

I think it’s cheaper because it is shorter. I wonder if the data transfer bandwidth is the source of all these issues

Club 3D | USB4 Gen3x2 Type-C Bi-Directional Cable 8K60Hz or 4K120Hz, Data...

Amazon.com: Club 3D Usb4 Gen3X2 Type-C Bi-Directional Cable 8K60Hz, W128564682...

This can be a potential substitute, but 9.84 ft is a little tight oh wait both of my cables are 3M long, maybe it might work

[bedHedd]

@wendell @Level1_Amber based on the logs and chatgpt’s interpretation would you be able to simulate these two scenarios:

1. 10gbs cable bandwidth (add synthetic throttle between a pc and the kvm
2. simulate a usb device power draw > 5V

If you could do that, it would help me determine what to buy and test next to solve this issue

context for why those 2 scenarios

I got a weird bug today when i was booting into nix.

usb 3-2.2 cant set config #1 error -71

I was rapidly switching between my work laptop and my desktop and the display went black. when I tried rebooting, I tog this usb error

chatgpt explained the error as

@chatgpt

…

Common Causes

1. Bad cable or loose connection (most common)
   • Especially common with front-panel ports or USB hubs.
2. Insufficient power
   • External hard drives, DACs, or peripherals drawing too much current.
3. Faulty USB hub or front-panel header wiring.
   • Sometimes happens when the case’s USB wiring is off-spec.
4. High-speed negotiation issue
   • The device can’t handle USB 3 signaling properly.
5. Firmware/driver quirk
   • Sometimes seen with certain keyboards, DACs, or Arduino boards after suspend/resume.
     …

chatgpt's full context

That error —

usb 3-2.2: can't set config #1, error -71

— is a Linux kernel USB initialization error indicating that something went wrong during device enumeration (the phase when the kernel negotiates with a USB device to configure it).

Let’s break it down:

---

What It Means

• usb 3-2.2: the device path (bus 3, port 2, sub-port 2).
• can't set config #1: the kernel tried to set the first configuration descriptor (standard USB setup step) and failed.
• error -71: means EPROTO, a “protocol error” — usually due to electrical or signal problems on the USB line, or a misbehaving device.

---

Common Causes

1. Bad cable or loose connection (most common)

   • Especially common with front-panel ports or USB hubs.

2. Insufficient power

   • External hard drives, DACs, or peripherals drawing too much current.

3. Faulty USB hub or front-panel header wiring.

   • Sometimes happens when the case’s USB wiring is off-spec.

4. High-speed negotiation issue

   • The device can’t handle USB 3 signaling properly.

5. Firmware/driver quirk

   • Sometimes seen with certain keyboards, DACs, or Arduino boards after suspend/resume.

---

How to Diagnose

1. Check dmesg for nearby messages:

   dmesg | grep usb
   

   Look for lines before/after the error — they’ll usually show what kind of device it was (e.g. “New USB device found…”).

2. Unplug and replug the device directly into a rear I/O port (avoid hubs).
   Watch dmesg live:

   sudo dmesg -w
   

3. Try a different cable or port.
   Especially if it’s USB 3 — sometimes switching to a USB 2 port fixes it.

4. Power cycle the system with the PSU unplugged for 30 seconds.

   • Some USB controllers get stuck until full power is cut.

5. Disable autosuspend (if you suspect power management):

   echo -1 | sudo tee /sys/module/usbcore/parameters/autosuspend
   

6. If it’s a hub or front-panel connector, temporarily disconnect it from the motherboard to isolate the issue.

---

If It Persists

You can reset the USB bus without rebooting:

sudo rmmod xhci_pci && sudo modprobe xhci_pci

(or ehci_hcd if it’s USB 2).
This will temporarily drop all USB devices.

If a specific device always triggers it, try forcing it to USB 2 mode:

sudo modprobe usbcore old_scheme_first=1

---

Quick Summary Table

Cause	Fix
Faulty cable	Replace cable
Front-panel hub glitch	Plug directly into rear port
Power issue	Use powered hub / different port
Firmware bug	Kernel update or disable autosuspend
Persistent device failure	Force USB 2.0 mode (old_scheme_first=1)

---

If you share the lines from dmesg around that error (like 5–10 lines before and after), I can pinpoint whether it’s electrical, firmware, or enumeration-related. Would you like to paste that?

It suggested I run dmesg | grep usb, but I asked it to filter for to get the logs for 3-2.2 with sudo dmesg | grep -A3 -B3 "usb 3-2.2"

[    5.065068] ata2.00: configured for UDMA/133
[    5.081842] ahci 0000:03:00.1: port does not support device sleep
[    5.088541] scsi 1:0:0:0: Direct-Access     ATA      T-FORCE T253TY00 9004 PQ: 0 ANSI: 5
[    5.114303] usb 3-2.2: new full-speed USB device number 4 using xhci_hcd
[    5.234528] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[    5.234534] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.234537] usb 3-2.2: Product: USB Receiver
[    5.234539] usb 3-2.2: Manufacturer: Logitech
[    5.277005] usb 1-4: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[    5.277012] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.277014] usb 1-4: Product: USB Receiver
--
[ 2873.077015] Restarting tasks: Done
[ 2873.077039] random: crng reseeded on system resumption
[ 2873.077045] PM: suspend exit
[ 2873.077767] usb 3-2.2: USB disconnect, device number 4
[ 2873.081493] Bluetooth: hci0: Bootloader revision 0.0 build 2 week 52 2014
[ 2873.092663] Bluetooth: hci0: Device revision is 5
[ 2873.092667] Bluetooth: hci0: Secure boot is enabled
--
[ 2877.508176] Bluetooth: hci0: Reading supported features failed (-16)
[ 2877.508181] Bluetooth: hci0: Error reading debug features
[ 2877.508186] Bluetooth: hci0: HCI LE Coded PHY feature bit is set, but its usage is not supported.
[ 2895.992894] usb 3-2.2: new full-speed USB device number 9 using xhci_hcd
[ 2896.113034] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[ 2896.113038] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2896.113041] usb 3-2.2: Product: USB Receiver
[ 2896.113043] usb 3-2.2: Manufacturer: Logitech
[ 2896.254238] logitech-djreceiver 0003:046D:C52B.0019: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2
[ 2896.367422] input: Logitech MX Vertical as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0019/0003:046D:407B.001A/input/input56
[ 2896.407960] logitech-hidpp-device 0003:046D:407B.001A: input,hidraw9: USB HID v1.11 Keyboard [Logitech MX Vertical] on usb-0000:2a:00.3-2.2/input2:1

full usb dmesg output

[    0.750635] usbcore: registered new interface driver usbfs
[    0.750643] usbcore: registered new interface driver hub
[    0.750654] usbcore: registered new device driver usb
[    0.818829] usbcore: registered new interface driver usbserial_generic
[    0.818834] usbserial: USB Serial support registered for generic
[    4.039020] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.16
[    4.039023] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.039025] usb usb1: Product: xHCI Host Controller
[    4.039027] usb usb1: Manufacturer: Linux 6.16.9 xhci-hcd
[    4.039028] usb usb1: SerialNumber: 0000:03:00.0
[    4.040211] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[    4.040241] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 6.16
[    4.040243] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.040245] usb usb2: Product: xHCI Host Controller
[    4.040247] usb usb2: Manufacturer: Linux 6.16.9 xhci-hcd
[    4.040248] usb usb2: SerialNumber: 0000:03:00.0
[    4.041519] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.16
[    4.041521] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.041523] usb usb3: Product: xHCI Host Controller
[    4.041524] usb usb3: Manufacturer: Linux 6.16.9 xhci-hcd
[    4.041526] usb usb3: SerialNumber: 0000:2a:00.3
[    4.041829] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
[    4.041856] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 6.16
[    4.041858] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    4.041860] usb usb4: Product: xHCI Host Controller
[    4.041861] usb usb4: Manufacturer: Linux 6.16.9 xhci-hcd
[    4.041863] usb usb4: SerialNumber: 0000:2a:00.3
[    4.282643] usb 3-2: new high-speed USB device number 2 using xhci_hcd
[    4.335626] usb 1-1: new full-speed USB device number 2 using xhci_hcd
[    4.412904] usb 3-2: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice=93.07
[    4.412910] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    4.412913] usb 3-2: Product: USB2.1 Hub
[    4.412915] usb 3-2: Manufacturer: GenesysLogic
[    4.713215] usb 1-1: New USB device found, idVendor=3434, idProduct=0b10, bcdDevice= 1.00
[    4.713221] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    4.713224] usb 1-1: Product: Keychron Q1 HE
[    4.713225] usb 1-1: Manufacturer: Keychron
[    4.836630] usb 3-2.1: new full-speed USB device number 3 using xhci_hcd
[    4.907673] usb 1-4: new full-speed USB device number 3 using xhci_hcd
[    4.957636] usb 3-2.1: New USB device found, idVendor=09ea, idProduct=0130, bcdDevice= 0.12
[    4.957643] usb 3-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    4.957645] usb 3-2.1: Product: Virtual HUB
[    4.957647] usb 3-2.1: Manufacturer: Generic
[    4.957649] usb 3-2.1: SerialNumber: 00000001
[    5.114303] usb 3-2.2: new full-speed USB device number 4 using xhci_hcd
[    5.234528] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[    5.234534] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.234537] usb 3-2.2: Product: USB Receiver
[    5.234539] usb 3-2.2: Manufacturer: Logitech
[    5.277005] usb 1-4: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[    5.277012] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.277014] usb 1-4: Product: USB Receiver
[    5.277016] usb 1-4: Manufacturer: Logitech
[    5.356411] usb 3-2.1.1: new full-speed USB device number 5 using xhci_hcd
[    5.451637] usb 3-2.1.1: New USB device found, idVendor=0d8c, idProduct=0016, bcdDevice= 1.00
[    5.451645] usb 3-2.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.451647] usb 3-2.1.1: Product: USB Audio Device
[    5.451649] usb 3-2.1.1: Manufacturer: C-Media Electronics Inc.
[    5.468628] usb 1-5: new high-speed USB device number 4 using xhci_hcd
[    5.525638] usb 3-2.4: new high-speed USB device number 6 using xhci_hcd
[    5.637644] usb 3-2.4: New USB device found, idVendor=194f, idProduct=0109, bcdDevice= 1.17
[    5.637650] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    5.637652] usb 3-2.4: Product: Studio 24c
[    5.637654] usb 3-2.4: Manufacturer: PreSonus
[    5.637656] usb 3-2.4: SerialNumber: SC1E21474611
[    5.676255] usb 1-5: New USB device found, idVendor=058f, idProduct=6364, bcdDevice= 1.00
[    5.676259] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    5.676261] usb 1-5: Product: Mass Storage Device
[    5.676263] usb 1-5: Manufacturer: Generic
[    5.676265] usb 1-5: SerialNumber: 058F63646476
[    5.702288] usb 3-2.1.2: new full-speed USB device number 7 using xhci_hcd
[    5.811531] usb 3-2.1.2: New USB device found, idVendor=3434, idProduct=0220, bcdDevice= 1.00
[    5.811536] usb 3-2.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    5.811539] usb 3-2.1.2: Product: Keychron K2 Pro
[    5.811541] usb 3-2.1.2: Manufacturer: Keychron
[    5.863768] usb 1-8: new high-speed USB device number 5 using xhci_hcd
[    6.032308] usb 3-2.1.6: new full-speed USB device number 8 using xhci_hcd
[    6.080184] usb 1-8: New USB device found, idVendor=2109, idProduct=2822, bcdDevice= 7.83
[    6.080189] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    6.080192] usb 1-8: Product: USB2.0 Hub             
[    6.080194] usb 1-8: Manufacturer: VIA Labs, Inc.         
[    6.080197] usb 1-8: SerialNumber: 000000001
[    6.080230] usb-storage 1-5:1.0: USB Mass Storage device detected
[    6.080406] scsi host8: usb-storage 1-5:1.0
[    6.080546] usbcore: registered new interface driver usb-storage
[    6.132518] usb 3-2.1.6: New USB device found, idVendor=09eb, idProduct=0131, bcdDevice= 0.02
[    6.132521] usb 3-2.1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    6.132523] usb 3-2.1.6: Product: Virtual HID
[    6.132525] usb 3-2.1.6: Manufacturer: Generic
[    6.132526] usb 3-2.1.6: SerialNumber: 00000001
[    6.212605] usbcore: registered new interface driver usbhid
[    6.212607] usbhid: USB HID core driver
[    6.213677] input: Keychron Keychron Q1 HE as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.0/0003:3434:0B10.0001/input/input0
[    6.226685] input: Generic Virtual HID as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.0/0003:09EB:0131.000F/input/input1
[    6.264363] hid-generic 0003:3434:0B10.0001: input,hidraw0: USB HID v1.11 Keyboard [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input0
[    6.264498] hid-generic 0003:3434:0B10.0002: hiddev96,hidraw1: USB HID v1.11 Device [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input1
[    6.264660] input: Keychron Keychron Q1 HE Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input2
[    6.315349] hid-generic 0003:09EB:0131.000F: input,hidraw2: USB HID v1.10 Keyboard [Generic Virtual HID] on usb-0000:2a:00.3-2.1.6/input0
[    6.315366] input: Keychron Keychron Q1 HE as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input3
[    6.315421] input: Keychron Keychron Q1 HE System Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input4
[    6.323725] input: Generic Virtual HID Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input7
[    6.341299] usb 1-9: new full-speed USB device number 6 using xhci_hcd
[    6.366364] input: Keychron Keychron Q1 HE Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input5
[    6.366391] input: Generic Virtual HID System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input8
[    6.366411] input: Keychron Keychron Q1 HE Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input6
[    6.418565] input: Generic Virtual HID Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input9
[    6.418610] hid-generic 0003:3434:0B10.0003: input,hidraw3: USB HID v1.11 Mouse [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input2
[    6.418631] hid-generic 0003:09EB:0131.0010: input,hidraw4: USB HID v1.10 Mouse [Generic Virtual HID] on usb-0000:2a:00.3-2.1.6/input1
[    6.418736] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.0/0003:046D:C52B.0004/input/input10
[    6.469345] hid-generic 0003:046D:C52B.0004: input,hidraw5: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:03:00.0-4/input0
[    6.469500] input: Logitech USB Receiver Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input11
[    6.469562] input: Logitech USB Receiver Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input12
[    6.521327] input: Logitech USB Receiver System Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input13
[    6.521404] hid-generic 0003:046D:C52B.0005: input,hiddev97,hidraw6: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:03:00.0-4/input1
[    6.521530] hid-generic 0003:046D:C52B.0006: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:03:00.0-4/input2
[    6.521644] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.0/0003:046D:C52B.0007/input/input15
[    6.573331] hid-generic 0003:046D:C52B.0007: input,hidraw8: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input0
[    6.573481] input: Logitech USB Receiver Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input16
[    6.573539] input: Logitech USB Receiver Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input17
[    6.624740] input: Logitech USB Receiver System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input18
[    6.624880] hid-generic 0003:046D:C52B.0008: input,hiddev99,hidraw9: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input1
[    6.625068] hid-generic 0003:046D:C52B.0009: hiddev100,hidraw10: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2
[    6.625165] input: C-Media Electronics Inc. USB Audio Device as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.1/3-2.1.1:1.3/0003:0D8C:0016.000A/input/input20
[    6.675757] hid-generic 0003:0D8C:0016.000A: input,hidraw11: USB HID v1.00 Device [C-Media Electronics Inc. USB Audio Device] on usb-0000:2a:00.3-2.1.1/input3
[    6.675911] hid-generic 0003:058F:6364.000B: hiddev101,hidraw12: USB HID v1.10 Device [Generic Mass Storage Device] on usb-0000:03:00.0-5/input1
[    6.676067] input: Keychron Keychron K2 Pro as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.0/0003:3434:0220.000C/input/input21
[    6.726533] hid-generic 0003:3434:0220.000C: input,hidraw13: USB HID v1.11 Keyboard [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input0
[    6.726693] hid-generic 0003:3434:0220.000D: hiddev102,hidraw14: USB HID v1.11 Device [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input1
[    6.726859] input: Keychron Keychron K2 Pro Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input22
[    6.726899] input: Keychron Keychron K2 Pro System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input23
[    6.775638] usb 1-8.2: new high-speed USB device number 7 using xhci_hcd
[    6.777463] input: Keychron Keychron K2 Pro Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input24
[    6.777513] input: Keychron Keychron K2 Pro Keyboard as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input25
[    6.777639] hid-generic 0003:3434:0220.000E: input,hidraw15: USB HID v1.11 Mouse [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input2
[    6.818687] logitech-djreceiver 0003:046D:C52B.0006: hiddev97,hidraw5: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:03:00.0-4/input2
[    6.925239] input: Logitech Wireless Device PID:404d Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input26
[    6.940371] input: Logitech Wireless Device PID:404d Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input27
[    6.940479] hid-generic 0003:046D:404D.0011: input,hidraw6: USB HID v1.11 Keyboard [Logitech Wireless Device PID:404d] on usb-0000:03:00.0-4/input2:1
[    6.944097] usb 1-9: New USB device found, idVendor=041e, idProduct=323b, bcdDevice=10.04
[    6.944102] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    6.944104] usb 1-9: Product: Sound Blaster E1
[    6.944106] usb 1-9: Manufacturer: Creative Technology Ltd
[    6.944108] usb 1-9: SerialNumber: 0000022171
[    6.947275] usb 1-8.2: New USB device found, idVendor=04b4, idProduct=6506, bcdDevice=50.00
[    6.947286] usb 1-8.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    6.947288] usb 1-8.2: Product: HP Windows Mixed Reality
[    6.947290] usb 1-8.2: Manufacturer: HP Inc.
[    6.947291] usb 1-8.2: SerialNumber: 3267AFFA77EE5478B7398E5FE3E3BA9D
[    6.966697] logitech-djreceiver 0003:046D:C52B.0009: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2
[    7.021063] input: Creative Technology Ltd Sound Blaster E1 as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-9/1-9:1.3/0003:041E:323B.0012/input/input32
[    7.071469] hid-generic 0003:041E:323B.0012: input,hiddev99,hidraw8: USB HID v1.00 Device [Creative Technology Ltd Sound Blaster E1] on usb-0000:03:00.0-9/input3
[    7.072029] input: Logitech Wireless Device PID:407b Keyboard as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input33
[    7.072068] input: Logitech Wireless Device PID:407b Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input34
[    7.072115] hid-generic 0003:046D:407B.0013: input,hidraw9: USB HID v1.11 Keyboard [Logitech Wireless Device PID:407b] on usb-0000:2a:00.3-2.2/input2:1
[    7.096945] input: Logitech K400 Plus as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input38
[    7.096991] logitech-hidpp-device 0003:046D:404D.0011: input,hidraw6: USB HID v1.11 Keyboard [Logitech K400 Plus] on usb-0000:03:00.0-4/input2:1
[    7.117885] input: Logitech MX Vertical as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input39
[    7.117924] logitech-hidpp-device 0003:046D:407B.0013: input,hidraw9: USB HID v1.11 Keyboard [Logitech MX Vertical] on usb-0000:2a:00.3-2.2/input2:1
[    7.246284] usb 1-10: new full-speed USB device number 8 using xhci_hcd
[    7.582287] usb 1-8.2.1: new high-speed USB device number 9 using xhci_hcd
[    7.608857] usb 1-10: New USB device found, idVendor=8087, idProduct=0a2b, bcdDevice= 0.01
[    7.608861] usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[    7.753350] usb 1-8.2.1: config 1 has an invalid interface number: 3 but max is 2
[    7.753354] usb 1-8.2.1: config 1 has an invalid interface number: 4 but max is 2
[    7.753356] usb 1-8.2.1: config 1 has no interface number 0
[    7.753358] usb 1-8.2.1: config 1 has no interface number 1
[    7.802370] usb 1-8.2.1: New USB device found, idVendor=045e, idProduct=0659, bcdDevice= 0.0b
[    7.802374] usb 1-8.2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    7.802377] usb 1-8.2.1: Product: HoloLens Sensors
[    7.802379] usb 1-8.2.1: Manufacturer: Microsoft
[    7.802381] usb 1-8.2.1: SerialNumber: adb06517-300e-478b-9d5d-e528d65a34c9
[    7.893161] hid-generic 0003:045E:0659.0014: hiddev100,hidraw10: USB HID v11.10 Device [Microsoft HoloLens Sensors] on usb-0000:03:00.0-8.2.1/input2
[    7.964296] usb 1-8.2.2: new high-speed USB device number 10 using xhci_hcd
[    8.331272] usbcore: registered new interface driver uas
[    8.423422] usbcore: registered new device driver onboard-usb-dev
[    8.841843] usb 3-2.4: Quirk or no altset; falling back to MIDI 1.0
[    8.860461] usbcore: registered new interface driver btusb
[    9.203261] usbcore: registered new interface driver snd-usb-audio
[    9.638570] usb 1-8.2.2: New USB device found, idVendor=0bda, idProduct=4c15, bcdDevice= 0.15
[    9.638574] usb 1-8.2.2: New USB device strings: Mfr=3, Product=1, SerialNumber=0
[    9.638576] usb 1-8.2.2: Product: USB Audio
[    9.638577] usb 1-8.2.2: Manufacturer: Generic
[    9.938593] usb 1-8.2.2: Warning! Unlikely big volume range (=799), cval->res is probably wrong.
[    9.938597] usb 1-8.2.2: [22] FU [PCM Playback Volume] ch = 2, val = -25600/-1/32
[    9.954816] input: Generic USB Audio Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-8/1-8.2/1-8.2.2/1-8.2.2:1.3/0003:0BDA:4C15.0015/input/input54
[   10.005377] input: Generic USB Audio as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-8/1-8.2/1-8.2.2/1-8.2.2:1.3/0003:0BDA:4C15.0015/input/input55
[   10.005470] hid-generic 0003:0BDA:4C15.0015: input,hiddev103,hidraw16: USB HID v1.11 Device [Generic USB Audio] on usb-0000:03:00.0-8.2.2/input3
[   10.075289] usb 1-8.2.3: new full-speed USB device number 11 using xhci_hcd
[   10.372640] usb 1-8.2.3: New USB device found, idVendor=03f0, idProduct=0580, bcdDevice= 2.00
[   10.372645] usb 1-8.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   10.372648] usb 1-8.2.3: Product: QHMD A85V
[   10.372650] usb 1-8.2.3: Manufacturer: Quanta Inc.
[   10.372652] usb 1-8.2.3: SerialNumber: 8CC220Z054
[   10.422928] hid-generic 0003:03F0:0580.0016: hiddev104,hidraw17: USB HID v1.11 Device [Quanta Inc. QHMD A85V] on usb-0000:03:00.0-8.2.3/input0
[ 2867.018931] usb usb1: root hub lost power or was reset
[ 2867.018933] usb usb2: root hub lost power or was reset
[ 2867.396667] usb 1-5: reset high-speed USB device number 4 using xhci_hcd
[ 2867.435716] usb 3-2.1.6: reset full-speed USB device number 8 using xhci_hcd
[ 2867.586435] usb 1-10: WARN: invalid context state for evaluate context command.
[ 2867.758830] usb 1-10: reset full-speed USB device number 8 using xhci_hcd
[ 2868.028663] usb 1-4: WARN: invalid context state for evaluate context command.
[ 2868.202120] usb 1-4: reset full-speed USB device number 3 using xhci_hcd
[ 2868.471742] usb 1-1: WARN: invalid context state for evaluate context command.
[ 2868.645144] usb 1-1: reset full-speed USB device number 2 using xhci_hcd
[ 2868.914777] usb 1-9: WARN: invalid context state for evaluate context command.
[ 2869.088083] usb 1-9: reset full-speed USB device number 6 using xhci_hcd
[ 2869.549149] usb 1-8: reset high-speed USB device number 5 using xhci_hcd
[ 2870.434189] usb 1-8.2: reset high-speed USB device number 7 using xhci_hcd
[ 2870.912159] usb 1-8.2.1: reset high-speed USB device number 9 using xhci_hcd
[ 2871.043229] usb 1-8.2.3: WARN: invalid context state for evaluate context command.
[ 2871.139177] usb 1-8.2.3: reset full-speed USB device number 11 using xhci_hcd
[ 2871.399232] usb 1-8.2.2: reset high-speed USB device number 10 using xhci_hcd
[ 2873.077767] usb 3-2.2: USB disconnect, device number 4
[ 2873.196010] usb 3-2.4: USB disconnect, device number 6
[ 2895.992894] usb 3-2.2: new full-speed USB device number 9 using xhci_hcd
[ 2896.113034] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11
[ 2896.113038] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 2896.113041] usb 3-2.2: Product: USB Receiver
[ 2896.113043] usb 3-2.2: Manufacturer: Logitech
[ 2896.254238] logitech-djreceiver 0003:046D:C52B.0019: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2
[ 2896.367422] input: Logitech MX Vertical as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0019/0003:046D:407B.001A/input/input56
[ 2896.407960] logitech-hidpp-device 0003:046D:407B.001A: input,hidraw9: USB HID v1.11 Keyboard [Logitech MX Vertical] on usb-0000:2a:00.3-2.2/input2:1
[ 2896.559918] usb 3-2.4: new high-speed USB device number 10 using xhci_hcd
[ 2896.659396] usb 3-2.4: New USB device found, idVendor=194f, idProduct=0109, bcdDevice= 1.17
[ 2896.659401] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2896.659403] usb 3-2.4: Product: Studio 24c
[ 2896.659405] usb 3-2.4: Manufacturer: PreSonus
[ 2896.659407] usb 3-2.4: SerialNumber: SC1E21474611
[ 2896.780298] usb 3-2.4: Quirk or no altset; falling back to MIDI 1.0

chatgpt thinks it’s either the logitech mx vertical or the presonus. I think it might be the cable because while I am in desktop, my usb devices disconnect but the display doesn’t cut out.

To debug further, chatgpt suggested inspecting the output of lsusb -t

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 002: Dev 002, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 011, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 013, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 013, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 013, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 013, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 015, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 015, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 015, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 016, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 016, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 012, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 012, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 014, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 014, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 014, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 014, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 014, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 014, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M

hypothesis #1 it’s a cable bandwidth issue

I asked chatgpt to give me the commands to parse the logs if I could trace it back to the cable being rated for USB C 3.1 Gen 2 10Gbps Data Transfer.

It suggested I run sudo dmesg -T | grep -E "usb|xhci|hub|SuperSpeed|link"

full dmseg log

[Thu Oct 9 20:37:20 2025] audit: initializing netlink subsys (disabled) [Thu Oct 9 20:37:20 2025] pci 0000:01:00.0: 31.504 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x4 link at 0000:00:01.1 (capable of 63.012 Gb/s with 16.0 GT/s PCIe x4 link) [Thu Oct 9 20:37:20 2025] pci 0000:26:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x16 link at 0000:00:03.1 (capable of 252.048 Gb/s with 16.0 GT/s PCIe x16 link) [Thu Oct 9 20:37:20 2025] pci 0000:28:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x16 link at 0000:00:03.1 (capable of 252.048 Gb/s with 16.0 GT/s PCIe x16 link) [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKA configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKB configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKC configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKD configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKE configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKF configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKG configured for IRQ 0 [Thu Oct 9 20:37:20 2025] ACPI: PCI: Interrupt link LNKH configured for IRQ 0 [Thu Oct 9 20:37:20 2025] usbcore: registered new interface driver usbfs [Thu Oct 9 20:37:20 2025] usbcore: registered new interface driver hub [Thu Oct 9 20:37:20 2025] usbcore: registered new device driver usb [Thu Oct 9 20:37:20 2025] usbcore: registered new interface driver usbserial_generic [Thu Oct 9 20:37:20 2025] usbserial: USB Serial support registered for generic [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring gfx_0.0.0 uses VM inv eng 0 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 6 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 7 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 8 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 9 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 10 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 11 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring sdma0 uses VM inv eng 12 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring sdma1 uses VM inv eng 13 on hub 0 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring vcn_unified_0 uses VM inv eng 0 on hub 8 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring vcn_unified_1 uses VM inv eng 1 on hub 8 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring jpeg_dec uses VM inv eng 4 on hub 8 [Thu Oct 9 20:37:23 2025] amdgpu 0000:28:00.0: amdgpu: ring mes_kiq_3.1.0 uses VM inv eng 14 on hub 0 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: xHCI Host Controller [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: new USB bus registered, assigned bus number 1 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: hcc params 0x0200ef81 hci version 0x110 quirks 0x0000000000000010 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: xHCI Host Controller [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: new USB bus registered, assigned bus number 2 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:03:00.0: Host supports USB 3.1 Enhanced SuperSpeed [Thu Oct 9 20:37:24 2025] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.16 [Thu Oct 9 20:37:24 2025] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [Thu Oct 9 20:37:24 2025] usb usb1: Product: xHCI Host Controller [Thu Oct 9 20:37:24 2025] usb usb1: Manufacturer: Linux 6.16.9 xhci-hcd [Thu Oct 9 20:37:24 2025] usb usb1: SerialNumber: 0000:03:00.0 [Thu Oct 9 20:37:24 2025] hub 1-0:1.0: USB hub found [Thu Oct 9 20:37:24 2025] hub 1-0:1.0: 10 ports detected [Thu Oct 9 20:37:24 2025] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM. [Thu Oct 9 20:37:24 2025] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 6.16 [Thu Oct 9 20:37:24 2025] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [Thu Oct 9 20:37:24 2025] usb usb2: Product: xHCI Host Controller [Thu Oct 9 20:37:24 2025] usb usb2: Manufacturer: Linux 6.16.9 xhci-hcd [Thu Oct 9 20:37:24 2025] usb usb2: SerialNumber: 0000:03:00.0 [Thu Oct 9 20:37:24 2025] hub 2-0:1.0: USB hub found [Thu Oct 9 20:37:24 2025] hub 2-0:1.0: 4 ports detected [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: xHCI Host Controller [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: new USB bus registered, assigned bus number 3 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: hcc params 0x0278ffe5 hci version 0x110 quirks 0x0000000000000010 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: xHCI Host Controller [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: new USB bus registered, assigned bus number 4 [Thu Oct 9 20:37:24 2025] xhci_hcd 0000:2a:00.3: Host supports USB 3.1 Enhanced SuperSpeed [Thu Oct 9 20:37:24 2025] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.16 [Thu Oct 9 20:37:24 2025] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [Thu Oct 9 20:37:24 2025] usb usb3: Product: xHCI Host Controller [Thu Oct 9 20:37:24 2025] usb usb3: Manufacturer: Linux 6.16.9 xhci-hcd [Thu Oct 9 20:37:24 2025] usb usb3: SerialNumber: 0000:2a:00.3 [Thu Oct 9 20:37:24 2025] hub 3-0:1.0: USB hub found [Thu Oct 9 20:37:24 2025] hub 3-0:1.0: 4 ports detected [Thu Oct 9 20:37:24 2025] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM. [Thu Oct 9 20:37:24 2025] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 6.16 [Thu Oct 9 20:37:24 2025] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [Thu Oct 9 20:37:24 2025] usb usb4: Product: xHCI Host Controller [Thu Oct 9 20:37:24 2025] usb usb4: Manufacturer: Linux 6.16.9 xhci-hcd [Thu Oct 9 20:37:24 2025] usb usb4: SerialNumber: 0000:2a:00.3 [Thu Oct 9 20:37:24 2025] hub 4-0:1.0: USB hub found [Thu Oct 9 20:37:24 2025] hub 4-0:1.0: 4 ports detected [Thu Oct 9 20:37:24 2025] usb 3-2: new high-speed USB device number 2 using xhci_hcd [Thu Oct 9 20:37:24 2025] usb 1-1: new full-speed USB device number 2 using xhci_hcd [Thu Oct 9 20:37:24 2025] usb 3-2: New USB device found, idVendor=05e3, idProduct=0610, bcdDevice=93.07 [Thu Oct 9 20:37:24 2025] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:24 2025] usb 3-2: Product: USB2.1 Hub [Thu Oct 9 20:37:24 2025] usb 3-2: Manufacturer: GenesysLogic [Thu Oct 9 20:37:24 2025] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [Thu Oct 9 20:37:24 2025] hub 3-2:1.0: USB hub found [Thu Oct 9 20:37:24 2025] hub 3-2:1.0: 4 ports detected [Thu Oct 9 20:37:24 2025] usb 1-1: New USB device found, idVendor=3434, idProduct=0b10, bcdDevice= 1.00 [Thu Oct 9 20:37:24 2025] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:24 2025] usb 1-1: Product: Keychron Q1 HE [Thu Oct 9 20:37:24 2025] usb 1-1: Manufacturer: Keychron [Thu Oct 9 20:37:25 2025] usb 3-2.1: new full-speed USB device number 3 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 1-4: new full-speed USB device number 3 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 3-2.1: New USB device found, idVendor=09ea, idProduct=0130, bcdDevice= 0.12 [Thu Oct 9 20:37:25 2025] usb 3-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:25 2025] usb 3-2.1: Product: Virtual HUB [Thu Oct 9 20:37:25 2025] usb 3-2.1: Manufacturer: Generic [Thu Oct 9 20:37:25 2025] usb 3-2.1: SerialNumber: 00000001 [Thu Oct 9 20:37:25 2025] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 20:37:25 2025] hub 3-2.1:1.0: USB hub found [Thu Oct 9 20:37:25 2025] hub 3-2.1:1.0: 7 ports detected [Thu Oct 9 20:37:25 2025] usb 3-2.2: new full-speed USB device number 4 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11 [Thu Oct 9 20:37:25 2025] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:25 2025] usb 3-2.2: Product: USB Receiver [Thu Oct 9 20:37:25 2025] usb 3-2.2: Manufacturer: Logitech [Thu Oct 9 20:37:25 2025] usb 1-4: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11 [Thu Oct 9 20:37:25 2025] usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:25 2025] usb 1-4: Product: USB Receiver [Thu Oct 9 20:37:25 2025] usb 1-4: Manufacturer: Logitech [Thu Oct 9 20:37:25 2025] usb 3-2.1.1: new full-speed USB device number 5 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 3-2.1.1: New USB device found, idVendor=0d8c, idProduct=0016, bcdDevice= 1.00 [Thu Oct 9 20:37:25 2025] usb 3-2.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:25 2025] usb 3-2.1.1: Product: USB Audio Device [Thu Oct 9 20:37:25 2025] usb 3-2.1.1: Manufacturer: C-Media Electronics Inc. [Thu Oct 9 20:37:25 2025] usb 1-5: new high-speed USB device number 4 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 3-2.4: new high-speed USB device number 6 using xhci_hcd [Thu Oct 9 20:37:25 2025] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 20:37:25 2025] usb 3-2.4: New USB device found, idVendor=194f, idProduct=0109, bcdDevice= 1.17 [Thu Oct 9 20:37:25 2025] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:25 2025] usb 3-2.4: Product: Studio 24c [Thu Oct 9 20:37:25 2025] usb 3-2.4: Manufacturer: PreSonus [Thu Oct 9 20:37:25 2025] usb 3-2.4: SerialNumber: SC1E21474611 [Thu Oct 9 20:37:25 2025] usb 1-5: New USB device found, idVendor=058f, idProduct=6364, bcdDevice= 1.00 [Thu Oct 9 20:37:25 2025] usb 1-5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:25 2025] usb 1-5: Product: Mass Storage Device [Thu Oct 9 20:37:25 2025] usb 1-5: Manufacturer: Generic [Thu Oct 9 20:37:25 2025] usb 1-5: SerialNumber: 058F63646476 [Thu Oct 9 20:37:25 2025] usb 3-2.1.2: new full-speed USB device number 7 using xhci_hcd [Thu Oct 9 20:37:25 2025] usb 3-2.1.2: New USB device found, idVendor=3434, idProduct=0220, bcdDevice= 1.00 [Thu Oct 9 20:37:25 2025] usb 3-2.1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 20:37:25 2025] usb 3-2.1.2: Product: Keychron K2 Pro [Thu Oct 9 20:37:25 2025] usb 3-2.1.2: Manufacturer: Keychron [Thu Oct 9 20:37:26 2025] usb 1-8: new high-speed USB device number 5 using xhci_hcd [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: new full-speed USB device number 8 using xhci_hcd [Thu Oct 9 20:37:26 2025] ata6: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 20:37:26 2025] usb 1-8: New USB device found, idVendor=2109, idProduct=2822, bcdDevice= 7.83 [Thu Oct 9 20:37:26 2025] usb 1-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:26 2025] usb 1-8: Product: USB2.0 Hub [Thu Oct 9 20:37:26 2025] usb 1-8: Manufacturer: VIA Labs, Inc. [Thu Oct 9 20:37:26 2025] usb 1-8: SerialNumber: 000000001 [Thu Oct 9 20:37:26 2025] usb-storage 1-5:1.0: USB Mass Storage device detected [Thu Oct 9 20:37:26 2025] scsi host8: usb-storage 1-5:1.0 [Thu Oct 9 20:37:26 2025] usbcore: registered new interface driver usb-storage [Thu Oct 9 20:37:26 2025] hub 1-8:1.0: USB hub found [Thu Oct 9 20:37:26 2025] hub 1-8:1.0: 2 ports detected [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: New USB device found, idVendor=09eb, idProduct=0131, bcdDevice= 0.02 [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: Product: Virtual HID [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: Manufacturer: Generic [Thu Oct 9 20:37:26 2025] usb 3-2.1.6: SerialNumber: 00000001 [Thu Oct 9 20:37:26 2025] usbcore: registered new interface driver usbhid [Thu Oct 9 20:37:26 2025] usbhid: USB HID core driver [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.0/0003:3434:0B10.0001/input/input0 [Thu Oct 9 20:37:26 2025] input: Generic Virtual HID as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.0/0003:09EB:0131.000F/input/input1 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0B10.0001: input,hidraw0: USB HID v1.11 Keyboard [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input0 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0B10.0002: hiddev96,hidraw1: USB HID v1.11 Device [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input1 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input2 [Thu Oct 9 20:37:26 2025] hid-generic 0003:09EB:0131.000F: input,hidraw2: USB HID v1.10 Keyboard [Generic Virtual HID] on usb-0000:2a:00.3-2.1.6/input0 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input3 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE System Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input4 [Thu Oct 9 20:37:26 2025] input: Generic Virtual HID Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input7 [Thu Oct 9 20:37:26 2025] usb 1-9: new full-speed USB device number 6 using xhci_hcd [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input5 [Thu Oct 9 20:37:26 2025] input: Generic Virtual HID System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input8 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron Q1 HE Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-1/1-1:1.2/0003:3434:0B10.0003/input/input6 [Thu Oct 9 20:37:26 2025] input: Generic Virtual HID Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.6/3-2.1.6:1.1/0003:09EB:0131.0010/input/input9 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0B10.0003: input,hidraw3: USB HID v1.11 Mouse [Keychron Keychron Q1 HE] on usb-0000:03:00.0-1/input2 [Thu Oct 9 20:37:26 2025] hid-generic 0003:09EB:0131.0010: input,hidraw4: USB HID v1.10 Mouse [Generic Virtual HID] on usb-0000:2a:00.3-2.1.6/input1 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.0/0003:046D:C52B.0004/input/input10 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0004: input,hidraw5: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:03:00.0-4/input0 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input11 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input12 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver System Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.1/0003:046D:C52B.0005/input/input13 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0005: input,hiddev97,hidraw6: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:03:00.0-4/input1 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0006: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:03:00.0-4/input2 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.0/0003:046D:C52B.0007/input/input15 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0007: input,hidraw8: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input0 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input16 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input17 [Thu Oct 9 20:37:26 2025] input: Logitech USB Receiver System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.1/0003:046D:C52B.0008/input/input18 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0008: input,hiddev99,hidraw9: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input1 [Thu Oct 9 20:37:26 2025] hid-generic 0003:046D:C52B.0009: hiddev100,hidraw10: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2 [Thu Oct 9 20:37:26 2025] input: C-Media Electronics Inc. USB Audio Device as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.1/3-2.1.1:1.3/0003:0D8C:0016.000A/input/input20 [Thu Oct 9 20:37:26 2025] hid-generic 0003:0D8C:0016.000A: input,hidraw11: USB HID v1.00 Device [C-Media Electronics Inc. USB Audio Device] on usb-0000:2a:00.3-2.1.1/input3 [Thu Oct 9 20:37:26 2025] hid-generic 0003:058F:6364.000B: hiddev101,hidraw12: USB HID v1.10 Device [Generic Mass Storage Device] on usb-0000:03:00.0-5/input1 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron K2 Pro as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.0/0003:3434:0220.000C/input/input21 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0220.000C: input,hidraw13: USB HID v1.11 Keyboard [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input0 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0220.000D: hiddev102,hidraw14: USB HID v1.11 Device [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input1 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron K2 Pro Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input22 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron K2 Pro System Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input23 [Thu Oct 9 20:37:26 2025] usb 1-8.2: new high-speed USB device number 7 using xhci_hcd [Thu Oct 9 20:37:26 2025] input: Keychron Keychron K2 Pro Consumer Control as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input24 [Thu Oct 9 20:37:26 2025] input: Keychron Keychron K2 Pro Keyboard as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.1/3-2.1.2/3-2.1.2:1.2/0003:3434:0220.000E/input/input25 [Thu Oct 9 20:37:26 2025] hid-generic 0003:3434:0220.000E: input,hidraw15: USB HID v1.11 Mouse [Keychron Keychron K2 Pro] on usb-0000:2a:00.3-2.1.2/input2 [Thu Oct 9 20:37:26 2025] logitech-djreceiver 0003:046D:C52B.0006: hiddev97,hidraw5: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:03:00.0-4/input2 [Thu Oct 9 20:37:27 2025] input: Logitech Wireless Device PID:404d Keyboard as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input26 [Thu Oct 9 20:37:27 2025] input: Logitech Wireless Device PID:404d Mouse as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input27 [Thu Oct 9 20:37:27 2025] hid-generic 0003:046D:404D.0011: input,hidraw6: USB HID v1.11 Keyboard [Logitech Wireless Device PID:404d] on usb-0000:03:00.0-4/input2:1 [Thu Oct 9 20:37:27 2025] usb 1-9: New USB device found, idVendor=041e, idProduct=323b, bcdDevice=10.04 [Thu Oct 9 20:37:27 2025] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:27 2025] usb 1-9: Product: Sound Blaster E1 [Thu Oct 9 20:37:27 2025] usb 1-9: Manufacturer: Creative Technology Ltd [Thu Oct 9 20:37:27 2025] usb 1-9: SerialNumber: 0000022171 [Thu Oct 9 20:37:27 2025] usb 1-8.2: New USB device found, idVendor=04b4, idProduct=6506, bcdDevice=50.00 [Thu Oct 9 20:37:27 2025] usb 1-8.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:27 2025] usb 1-8.2: Product: HP Windows Mixed Reality [Thu Oct 9 20:37:27 2025] usb 1-8.2: Manufacturer: HP Inc. [Thu Oct 9 20:37:27 2025] usb 1-8.2: SerialNumber: 3267AFFA77EE5478B7398E5FE3E3BA9D [Thu Oct 9 20:37:27 2025] hub 1-8.2:1.0: USB hub found [Thu Oct 9 20:37:27 2025] hub 1-8.2:1.0: 4 ports detected [Thu Oct 9 20:37:27 2025] logitech-djreceiver 0003:046D:C52B.0009: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2 [Thu Oct 9 20:37:27 2025] input: Creative Technology Ltd Sound Blaster E1 as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-9/1-9:1.3/0003:041E:323B.0012/input/input32 [Thu Oct 9 20:37:27 2025] hid-generic 0003:041E:323B.0012: input,hiddev99,hidraw8: USB HID v1.00 Device [Creative Technology Ltd Sound Blaster E1] on usb-0000:03:00.0-9/input3 [Thu Oct 9 20:37:27 2025] input: Logitech Wireless Device PID:407b Keyboard as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input33 [Thu Oct 9 20:37:27 2025] input: Logitech Wireless Device PID:407b Mouse as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input34 [Thu Oct 9 20:37:27 2025] hid-generic 0003:046D:407B.0013: input,hidraw9: USB HID v1.11 Keyboard [Logitech Wireless Device PID:407b] on usb-0000:2a:00.3-2.2/input2:1 [Thu Oct 9 20:37:27 2025] input: Logitech K400 Plus as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-4/1-4:1.2/0003:046D:C52B.0006/0003:046D:404D.0011/input/input38 [Thu Oct 9 20:37:27 2025] logitech-hidpp-device 0003:046D:404D.0011: input,hidraw6: USB HID v1.11 Keyboard [Logitech K400 Plus] on usb-0000:03:00.0-4/input2:1 [Thu Oct 9 20:37:27 2025] input: Logitech MX Vertical as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0009/0003:046D:407B.0013/input/input39 [Thu Oct 9 20:37:27 2025] logitech-hidpp-device 0003:046D:407B.0013: input,hidraw9: USB HID v1.11 Keyboard [Logitech MX Vertical] on usb-0000:2a:00.3-2.2/input2:1 [Thu Oct 9 20:37:27 2025] usb 1-10: new full-speed USB device number 8 using xhci_hcd [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: new high-speed USB device number 9 using xhci_hcd [Thu Oct 9 20:37:27 2025] usb 1-10: New USB device found, idVendor=8087, idProduct=0a2b, bcdDevice= 0.01 [Thu Oct 9 20:37:27 2025] usb 1-10: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: config 1 has an invalid interface number: 3 but max is 2 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: config 1 has an invalid interface number: 4 but max is 2 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: config 1 has no interface number 0 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: config 1 has no interface number 1 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: New USB device found, idVendor=045e, idProduct=0659, bcdDevice= 0.0b [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: Product: HoloLens Sensors [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: Manufacturer: Microsoft [Thu Oct 9 20:37:27 2025] usb 1-8.2.1: SerialNumber: adb06517-300e-478b-9d5d-e528d65a34c9 [Thu Oct 9 20:37:28 2025] hid-generic 0003:045E:0659.0014: hiddev100,hidraw10: USB HID v11.10 Device [Microsoft HoloLens Sensors] on usb-0000:03:00.0-8.2.1/input2 [Thu Oct 9 20:37:28 2025] usb 1-8.2.2: new high-speed USB device number 10 using xhci_hcd [Thu Oct 9 20:37:28 2025] usbcore: registered new interface driver uas [Thu Oct 9 20:37:28 2025] usbcore: registered new device driver onboard-usb-dev [Thu Oct 9 20:37:29 2025] usb 3-2.4: Quirk or no altset; falling back to MIDI 1.0 [Thu Oct 9 20:37:29 2025] usbcore: registered new interface driver btusb [Thu Oct 9 20:37:29 2025] usbcore: registered new interface driver snd-usb-audio [Thu Oct 9 20:37:29 2025] usb 1-8.2.2: New USB device found, idVendor=0bda, idProduct=4c15, bcdDevice= 0.15 [Thu Oct 9 20:37:29 2025] usb 1-8.2.2: New USB device strings: Mfr=3, Product=1, SerialNumber=0 [Thu Oct 9 20:37:29 2025] usb 1-8.2.2: Product: USB Audio [Thu Oct 9 20:37:29 2025] usb 1-8.2.2: Manufacturer: Generic [Thu Oct 9 20:37:30 2025] usb 1-8.2.2: Warning! Unlikely big volume range (=799), cval->res is probably wrong. [Thu Oct 9 20:37:30 2025] usb 1-8.2.2: [22] FU [PCM Playback Volume] ch = 2, val = -25600/-1/32 [Thu Oct 9 20:37:30 2025] input: Generic USB Audio Consumer Control as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-8/1-8.2/1-8.2.2/1-8.2.2:1.3/0003:0BDA:4C15.0015/input/input54 [Thu Oct 9 20:37:30 2025] input: Generic USB Audio as /devices/pci0000:00/0000:00:01.3/0000:03:00.0/usb1/1-8/1-8.2/1-8.2.2/1-8.2.2:1.3/0003:0BDA:4C15.0015/input/input55 [Thu Oct 9 20:37:30 2025] hid-generic 0003:0BDA:4C15.0015: input,hiddev103,hidraw16: USB HID v1.11 Device [Generic USB Audio] on usb-0000:03:00.0-8.2.2/input3 [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: new full-speed USB device number 11 using xhci_hcd [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: New USB device found, idVendor=03f0, idProduct=0580, bcdDevice= 2.00 [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: Product: QHMD A85V [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: Manufacturer: Quanta Inc. [Thu Oct 9 20:37:30 2025] usb 1-8.2.3: SerialNumber: 8CC220Z054 [Thu Oct 9 20:37:30 2025] hid-generic 0003:03F0:0580.0016: hiddev104,hidraw17: USB HID v1.11 Device [Quanta Inc. QHMD A85V] on usb-0000:03:00.0-8.2.3/input0 [Thu Oct 9 21:25:07 2025] xhci_hcd 0000:03:00.0: xHC error in resume, USBSTS 0x401, Reinit [Thu Oct 9 21:25:07 2025] usb usb1: root hub lost power or was reset [Thu Oct 9 21:25:07 2025] usb usb2: root hub lost power or was reset [Thu Oct 9 21:25:07 2025] usb 1-5: reset high-speed USB device number 4 using xhci_hcd [Thu Oct 9 21:25:07 2025] usb 3-2.1.6: reset full-speed USB device number 8 using xhci_hcd [Thu Oct 9 21:25:07 2025] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 21:25:07 2025] ata5: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 21:25:07 2025] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring gfx_0.0.0 uses VM inv eng 0 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.0.0 uses VM inv eng 1 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.1.0 uses VM inv eng 4 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.2.0 uses VM inv eng 6 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.3.0 uses VM inv eng 7 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.0.1 uses VM inv eng 8 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.1.1 uses VM inv eng 9 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.2.1 uses VM inv eng 10 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring comp_1.3.1 uses VM inv eng 11 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring sdma0 uses VM inv eng 12 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring sdma1 uses VM inv eng 13 on hub 0 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring vcn_unified_0 uses VM inv eng 0 on hub 8 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring vcn_unified_1 uses VM inv eng 1 on hub 8 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring jpeg_dec uses VM inv eng 4 on hub 8 [Thu Oct 9 21:25:07 2025] amdgpu 0000:28:00.0: amdgpu: ring mes_kiq_3.1.0 uses VM inv eng 14 on hub 0 [Thu Oct 9 21:25:07 2025] usb 1-10: WARN: invalid context state for evaluate context command. [Thu Oct 9 21:25:07 2025] usb 1-10: reset full-speed USB device number 8 using xhci_hcd [Thu Oct 9 21:25:08 2025] usb 1-4: WARN: invalid context state for evaluate context command. [Thu Oct 9 21:25:08 2025] usb 1-4: reset full-speed USB device number 3 using xhci_hcd [Thu Oct 9 21:25:08 2025] usb 1-1: WARN: invalid context state for evaluate context command. [Thu Oct 9 21:25:08 2025] usb 1-1: reset full-speed USB device number 2 using xhci_hcd [Thu Oct 9 21:25:09 2025] usb 1-9: WARN: invalid context state for evaluate context command. [Thu Oct 9 21:25:09 2025] usb 1-9: reset full-speed USB device number 6 using xhci_hcd [Thu Oct 9 21:25:09 2025] usb 1-8: reset high-speed USB device number 5 using xhci_hcd [Thu Oct 9 21:25:10 2025] ata6: SATA link up 6.0 Gbps (SStatus 133 SControl 300) [Thu Oct 9 21:25:10 2025] usb 1-8.2: reset high-speed USB device number 7 using xhci_hcd [Thu Oct 9 21:25:11 2025] usb 1-8.2.1: reset high-speed USB device number 9 using xhci_hcd [Thu Oct 9 21:25:11 2025] usb 1-8.2.3: WARN: invalid context state for evaluate context command. [Thu Oct 9 21:25:11 2025] usb 1-8.2.3: reset full-speed USB device number 11 using xhci_hcd [Thu Oct 9 21:25:11 2025] usb 1-8.2.2: reset high-speed USB device number 10 using xhci_hcd [Thu Oct 9 21:25:13 2025] usb 3-2.2: USB disconnect, device number 4 [Thu Oct 9 21:25:13 2025] usb 3-2.4: USB disconnect, device number 6 [Thu Oct 9 21:25:36 2025] usb 3-2.2: new full-speed USB device number 9 using xhci_hcd [Thu Oct 9 21:25:36 2025] usb 3-2.2: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=24.11 [Thu Oct 9 21:25:36 2025] usb 3-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [Thu Oct 9 21:25:36 2025] usb 3-2.2: Product: USB Receiver [Thu Oct 9 21:25:36 2025] usb 3-2.2: Manufacturer: Logitech [Thu Oct 9 21:25:36 2025] logitech-djreceiver 0003:046D:C52B.0019: hiddev98,hidraw7: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:2a:00.3-2.2/input2 [Thu Oct 9 21:25:36 2025] input: Logitech MX Vertical as /devices/pci0000:00/0000:00:08.1/0000:2a:00.3/usb3/3-2/3-2.2/3-2.2:1.2/0003:046D:C52B.0019/0003:046D:407B.001A/input/input56 [Thu Oct 9 21:25:36 2025] logitech-hidpp-device 0003:046D:407B.001A: input,hidraw9: USB HID v1.11 Keyboard [Logitech MX Vertical] on usb-0000:2a:00.3-2.2/input2:1 [Thu Oct 9 21:25:36 2025] usb 3-2.4: new high-speed USB device number 10 using xhci_hcd [Thu Oct 9 21:25:36 2025] usb 3-2.4: New USB device found, idVendor=194f, idProduct=0109, bcdDevice= 1.17 [Thu Oct 9 21:25:36 2025] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [Thu Oct 9 21:25:36 2025] usb 3-2.4: Product: Studio 24c [Thu Oct 9 21:25:36 2025] usb 3-2.4: Manufacturer: PreSonus [Thu Oct 9 21:25:36 2025] usb 3-2.4: SerialNumber: SC1E21474611 [Thu Oct 9 21:25:36 2025] usb 3-2.4: Quirk or no altset; falling back to MIDI 1.0

chatgpt interpreted this as

@chatgpt

Short answer: your logs point to power/reset instability on the xHCI + hub/KVM branch, not a clean “10 Gb/s lane fell back” story. You can still infer cable/branch issues indirectly — here’s what your dump shows and how to prove it.

What your log proves

• Resume glitch on the USB controller:

  xhci_hcd 0000:03:00.0: xHC error in resume, USBSTS 0x401, Reinit
  usb usb1/usb2: root hub lost power or was reset
  

  That means the host controller halted on resume → every downstream device had to be reset.

• Everything on the Bus-1/Bus-3 tree gets reset in a wave, then devices on the 3-2 hub branch drop and come back:

  usb 3-2.2: USB disconnect …         # Logitech receiver on the 3-2 hub
  usb 3-2.4: USB disconnect …         # PreSonus 24c on the same hub
  …
  usb 3-2.2: new full-speed USB device
  usb 3-2.4: new high-speed USB device
  

  That’s classic of a marginal hub/KVM/cable path: the branch browns out or the controller reset exposes timing/signal weakness, then re-enumeration succeeds once the bus is stable again.

• I do not see explicit “SuperSpeed fell back to 480M” messages. Most of the devices you showed here are USB 2 (12M/480M) anyway, so we wouldn’t expect SuperSpeed training logs. This means the logs don’t directly say “10 Gb/s cable is bad,” but they do show the unstable branch symptoms.

How to check “bandwidth/cable” issues explicitly

These won’t say “your cable is bad,” but they reveal negotiation failures and fallback:

1. Search for tell-tale fallback / link errors

   sudo dmesg -T | grep -Ei 'superspeed|gen [12]|device descriptor read|EPROTO|EILSEQ|not running at top speed|reset SuperSpeed|training|link'
   

2. See actual negotiated speeds

   lsusb -t
   # Look for 480M vs 5000M vs 10000M on devices you expect to be USB3.
   # If KVM/cable is the choke point, USB3 gear behind it will show 480M.
   

3. Per-device link speed (sysfs)

   # Lists all; grep a specific device path if you want
   for d in /sys/bus/usb/devices/*/speed; do echo -n "$d: "; cat "$d"; done
   

4. Low-level transfer errors (usbmon)

   sudo modprobe usbmon
   # For bus 3 (your 3-2 hub branch), watch for protocol errors while you wiggle the cable / switch the KVM:
   sudo cat /sys/kernel/debug/usb/usbmon/3u | grep -Ei 'err|EPROTO|EILSEQ'
   

   Repeated EPROTO/EILSEQ during simple HID traffic strongly suggests signal integrity trouble.

What I’d change on your setup

• Move the Logitech receiver off the 3-2 hub/KVM chain → plug it into a rear USB-2 (black) motherboard port (or a short USB-2 extension from a rear port). Dongles hate long USB-C/KVM paths.

• Give the PreSonus 24c its own stable port (or a powered hub), not the same unpowered branch with many full-speed HIDs.

• Tame power management on the receiver (prevents resume hiccups):

  # one-shot
  echo on | sudo tee /sys/bus/usb/devices/3-2.2/power/control 2>/dev/null
  # persistent
  sudo tee /etc/udev/rules.d/99-logitech-unify.rules >/dev/null <<'EOF'
  ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="046d", ATTR{idProduct}=="c52b", \
    TEST=="power/control", ATTR{power/control}="on"
  EOF
  sudo udevadm control --reload
  

• If controller resume errors keep happening, test a boot with:

  • usbcore.autosuspend=-1 (quick global check)
  • Update BIOS/UEFI; toggle ErP / “USB power in S4/S5”.

Bottom line

Your provided log already confirms controller resume → hub branch resets → Logitech/PreSonus drop/re-enumerate. That’s consistent with a marginal KVM/cable/hub path. Use the commands above to catch explicit link-rate fallback or protocol errors; but the practical fix is to take the Logitech receiver off that chain and isolate power-hungry devices (like the 24c) to a sturdier path.

I decided to run the following:

 cat /sys/bus/usb/devices/usb*/speed
480
10000
480
10000

 sudo modprobe usbmon

dmesg | grep -E "typec|pd|altmode"
[    0.000000] Command line: initrd=\EFI\nixos\bfdvy78ryljnr69221pdpgysva5sphma-initrd-linux-6.16.9-initrd.efi init=/nix/store/g1hh6jci0qdaf7mn1jgzffgw8rjksi2l-nixos-system-master-of-cooling-25.11.20251002.7df7ff7/init loglevel=4 lsm=landlock,yama,bpf
[    0.000126] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[    0.000323] e820: update [mem 0xbcb90000-0xbcb9ffff] usable ==> reserved
[    0.000326] e820: update [mem 0xc0000000-0xffffffff] usable ==> reserved
[    0.069924] e820: update [mem 0xb7f05000-0xb7f61fff] usable ==> reserved
[    0.073813] Kernel command line: initrd=\EFI\nixos\bfdvy78ryljnr69221pdpgysva5sphma-initrd-linux-6.16.9-initrd.efi init=/nix/store/g1hh6jci0qdaf7mn1jgzffgw8rjksi2l-nixos-system-master-of-cooling-25.11.20251002.7df7ff7/init loglevel=4 lsm=landlock,yama,bpf
[    0.669718] Spectre V2 : Update user space SMT mitigation: STIBP always-on
[    0.902732] microcode: Updated early from: 0x0a20120a
[    0.916569] PM: genpd: Disabling unused power domains
[    8.119938] systemd[1]: /etc/systemd/system/cups.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/cups/cups.sock → /run/cups/cups.sock; please update the unit file accordingly.
[ 2866.928028] Spectre V2 : Update user space SMT mitigation: STIBP off
[ 2866.985378] Spectre V2 : Update user space SMT mitigation: STIBP always-on

it interpreted the logs

@chatgpt

What your data shows

• lsusb -t: You have two USB3 root hubs (Bus 002 and Bus 004, both 10000M) and two USB2 root hubs (Bus 001 and Bus 003, both 480M).
  Almost everything you listed is enumerating at USB2 speeds (12M/480M) behind hubs—expected for keyboards, Logitech receiver, audio, etc. There’s no obvious “USB3 device fell back to 480M” in that tree.
• cat /sys/bus/usb/devices/usb*/speed printed root hub speeds only (480, 10000, 480, 10000). That’s normal; it doesn’t reflect the speeds of individual child devices.
• dmesg | grep typec … shows nothing — either no Type-C PD/alt-mode logs, or the controller doesn’t log them in your setup.
• The earlier resume event (xHC error in resume … Reinit) + mass resets still points to controller/hub branch instability, consistent with a marginal KVM/cable branch, but not a clean bandwidth fallback message.

chatgpt also suggested I run

cat /sys/bus/usb/devices/3-2.2/speed 
12

hypothesis #2 the presonus is drawing more than the kvm can deliver

chatgpt suggested I run the following commands

sudo grep . /sys/bus/usb/devices/3-2.4/{bMaxPower,bConfigurationValue,bNumConfigurations,power/*}
sudo grep -H . /sys/bus/usb/devices/*/bMaxPower
sudo grep . /sys/bus/usb/devices/3-2.4/power/* 

kernel view of presonus

sudo grep . /sys/bus/usb/devices/3-2.4/{bMaxPower,bConfigurationValue,bNumConfigurations,power/*}
/sys/bus/usb/devices/3-2.4/bMaxPower:500mA
/sys/bus/usb/devices/3-2.4/bConfigurationValue:1
/sys/bus/usb/devices/3-2.4/bNumConfigurations:1
/sys/bus/usb/devices/3-2.4/power/active_duration:1357500
/sys/bus/usb/devices/3-2.4/power/async:enabled
/sys/bus/usb/devices/3-2.4/power/autosuspend:2
/sys/bus/usb/devices/3-2.4/power/autosuspend_delay_ms:2000
/sys/bus/usb/devices/3-2.4/power/connected_duration:1357500
/sys/bus/usb/devices/3-2.4/power/control:on
/sys/bus/usb/devices/3-2.4/power/level:on
/sys/bus/usb/devices/3-2.4/power/persist:1
/sys/bus/usb/devices/3-2.4/power/runtime_active_kids:2
/sys/bus/usb/devices/3-2.4/power/runtime_active_time:1357303
/sys/bus/usb/devices/3-2.4/power/runtime_enabled:forbidden
/sys/bus/usb/devices/3-2.4/power/runtime_status:active
/sys/bus/usb/devices/3-2.4/power/runtime_suspended_time:0
/sys/bus/usb/devices/3-2.4/power/runtime_usage:1

declared draw

sudo grep -H . /sys/bus/usb/devices/*/bMaxPower
/sys/bus/usb/devices/1-1/bMaxPower:500mA
/sys/bus/usb/devices/1-4/bMaxPower:98mA
/sys/bus/usb/devices/1-5/bMaxPower:250mA
/sys/bus/usb/devices/1-8.2.1/bMaxPower:100mA
/sys/bus/usb/devices/1-8.2.2/bMaxPower:100mA
/sys/bus/usb/devices/1-8.2.3/bMaxPower:400mA
/sys/bus/usb/devices/1-8.2/bMaxPower:0mA
/sys/bus/usb/devices/1-8/bMaxPower:0mA
/sys/bus/usb/devices/1-9/bMaxPower:100mA
/sys/bus/usb/devices/1-10/bMaxPower:100mA
/sys/bus/usb/devices/3-2.1.1/bMaxPower:100mA
/sys/bus/usb/devices/3-2.1.2/bMaxPower:100mA
/sys/bus/usb/devices/3-2.1.6/bMaxPower:2mA
/sys/bus/usb/devices/3-2.1/bMaxPower:100mA
/sys/bus/usb/devices/3-2.2/bMaxPower:98mA
/sys/bus/usb/devices/3-2.4/bMaxPower:500mA
/sys/bus/usb/devices/3-2/bMaxPower:100mA
/sys/bus/usb/devices/usb1/bMaxPower:0mA
/sys/bus/usb/devices/usb2/bMaxPower:0mA
/sys/bus/usb/devices/usb3/bMaxPower:0mA
/sys/bus/usb/devices/usb4/bMaxPower:0mA

runtime power management state

sudo grep . /sys/bus/usb/devices/3-2.4/power/*
/sys/bus/usb/devices/3-2.4/power/active_duration:1456026
/sys/bus/usb/devices/3-2.4/power/async:enabled
/sys/bus/usb/devices/3-2.4/power/autosuspend:2
/sys/bus/usb/devices/3-2.4/power/autosuspend_delay_ms:2000
/sys/bus/usb/devices/3-2.4/power/connected_duration:1456026
/sys/bus/usb/devices/3-2.4/power/control:on
/sys/bus/usb/devices/3-2.4/power/level:on
/sys/bus/usb/devices/3-2.4/power/persist:1
/sys/bus/usb/devices/3-2.4/power/runtime_active_kids:2
/sys/bus/usb/devices/3-2.4/power/runtime_active_time:1455829
/sys/bus/usb/devices/3-2.4/power/runtime_enabled:forbidden
/sys/bus/usb/devices/3-2.4/power/runtime_status:active
/sys/bus/usb/devices/3-2.4/power/runtime_suspended_time:0
/sys/bus/usb/devices/3-2.4/power/runtime_usage:1

chatgpt interpreted that as the presonus is drawing more power

@chatgpt

Your logs show the PreSonus needs 500 mA but it’s on a bus-powered hub branch that also feeds several other devices. That overcommits the 5 V budget, causing the resets/disconnects. Put the 24c on a dedicated/root or powered port, and the Logitech receiver on a simple USB-2 port — that should make the issues disappear.

full context

@chatgpt

Nice! That’s exactly the info we needed.

What the numbers say

• PreSonus 24c (3-2.4): bMaxPower: 500mA, runtime_status: active, autosuspend is effectively off (control:on, runtime_enabled: forbidden).
  → It’s a USB 2.0 high-speed device drawing the full 500 mA budget from its upstream port.

• Your hub chain on Bus 3 → Port 2 (Genesys 05e3:0610):

  • 3-2 (the 4-port hub): bMaxPower: 100mA ← this strongly suggests it’s bus-powered, not externally powered.

  • On that same branch you also have:

    • 3-2.2 Logitech receiver: 98 mA

    • 3-2.1 another hub: 100 mA

      • behind it: 3-2.1.1 C-Media audio: 100 mA
      • 3-2.1.2 Keychron: 100 mA
      • 3-2.1.6 virtual HID: 2 mA

So you’re asking a bus-powered hub (100 mA from upstream!) to feed a device that requests 500 mA, plus ~400 mA of other stuff. That’s out of spec and perfectly explains the resets and the “can’t set config / EPROTO” weirdness on that branch.

Why this matters

• On USB 2, the maximum a device can request is 500 mA.
• A bus-powered hub must budget from the single 500 mA it gets from upstream; the hub itself can take up to ~100 mA, leaving ~400 mA for all downstream ports combined. Many cheap hubs don’t enforce this strictly, which leads to brown-outs and flaky enumeration—exactly what you see.

What to do (practical fixes)

1. Move the PreSonus 24c off that bus-powered hub

   • Plug it directly into a rear motherboard port, or
   • Use a good powered USB hub (with its own power brick) and plug the 24c into that.

2. Move the Logitech receiver off the same branch

   • Put it on a rear USB-2 (black) port or a short USB-2 extension from the rear I/O.
   • Dongles work best on simple USB-2 paths (and away from USB-3 cabling noise).

3. (Optional) Verify the hub’s power type in descriptors:

   # Genesys hub descriptor (replace bus:dev if needed)
   lsusb | grep -i 05e3:0610
   sudo lsusb -v -d 05e3:0610 | grep -Ei 'Self Powered|MaxPower|bPwrOn2PwrGood'
   

   • If it says “Self Powered”, it has external power (yours likely won’t).
   • MaxPower for the hub itself shows what it draws from upstream (your 3-2: 100mA).

4. (Optional) Keep autosuspend off for the Logitech receiver to avoid resume hiccups:

   echo on | sudo tee /sys/bus/usb/devices/3-2.2/power/control
   

TL;DR

Your logs show the PreSonus needs 500 mA but it’s on a bus-powered hub branch that also feeds several other devices. That overcommits the 5 V budget, causing the resets/disconnects. Put the 24c on a dedicated/root or powered port, and the Logitech receiver on a simple USB-2 port — that should make the issues disappear.

[bedHedd]

@Level1_Amber, I tried with the club3d cable

Club 3D CAC-1579 USB4 Gen3x2 Type C to Type C Bi-Directional Cable with 240W Charging, 40Gbps Data Transmission and Supports 8K60Hz Video with Retimer IC 3m-9.84ft

I can’t get a shorter higher bandwidth cable because my desktop is physically 9ft from my kvm .

I tried it in all configurations between the Combiner:KVM (U3:U3, U2:U2, U3:U2, U2:U3). The crackling still occurred in all configurations

I don’t think the usb switch is the issue as when I connected my laptop to the switch and interface in this config:
laptop → usb switch → presonus 24c
there was no crackling in the audio.

Is L1 going to make a new higher bandwidth usb c combiner that can do U3 with display and usb?

[Level1_Amber]

Sorry you’re having so much trouble here, I’m not sure what alls going on. Were you wanting an RMA, etc…?

@bedHedd

Is L1 going to make a new higher bandwidth usb c combiner that can do U3 with display and usb?

The combiner should be U3? Weird. We do not have any new combiners coming up that I know about.

[bedHedd]

@Level1_Amber

Sorry you’re having so much trouble here, I’m not sure what alls going on. Were you wanting an RMA, etc…?

I just realized I didn’t reply back to Wendell’s email, let me email him logs from today’s tests.

@Level1_Amber

The combiner should be U3? Weird. We do not have any new combiners coming up that I know about.

I meant U3 full display and USB 3 speeds. Right now lsusb -t reports that the kvm is running at usb 2

/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 002: Dev 002, If 0, Class=Hub, Driver=hub/4p, 480M  ← Genesys (05e3:0610)

What’s really weird is that the combination of the usb c combiner leads to audio crackling. In wendell’s last update, he speculated it was a bandwidth constraint or the usb bus ran slow because another device wanted a lower usb rate

lsusb logs for varying configurations

lsusb with laptop

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 003: ID 0bda:58db Realtek Semiconductor Corp. Integrated Camera
Bus 001 Device 005: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/12p, 480M
    |__ Port 002: Dev 005, If 0, Class=Audio, Driver=snd-usb-audio, 480M
    |__ Port 002: Dev 005, If 1, Class=Audio, Driver=snd-usb-audio, 480M
    |__ Port 002: Dev 005, If 2, Class=Audio, Driver=snd-usb-audio, 480M
    |__ Port 002: Dev 005, If 3, Class=Audio, Driver=snd-usb-audio, 480M
    |__ Port 002: Dev 005, If 4, Class=Audio, Driver=snd-usb-audio, 480M
    |__ Port 002: Dev 005, If 5, Class=Application Specific Interface, Driver=[none], 480M
    |__ Port 006: Dev 002, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 006: Dev 002, If 1, Class=Wireless, Driver=btusb, 12M
    |__ Port 007: Dev 003, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 007: Dev 003, If 1, Class=Video, Driver=uvcvideo, 480M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 5000

lsusb when combiner set to U3, KVM U3

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 3434:0b10 Keychron Keychron Q1 HE
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
Bus 001 Device 005: ID 2109:2822 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 006: ID 041e:323b Creative Technology, Ltd Sound Blaster E1
Bus 001 Device 007: ID 04b4:6506 Cypress Semiconductor Corp. CY4603
Bus 001 Device 008: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 009: ID 045e:0659 Microsoft Corp. HoloLens Sensors
Bus 001 Device 010: ID 0bda:4c15 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 011: ID 03f0:0580 HP, Inc QHMD A85V
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB2.1 Hub
Bus 003 Device 004: ID 258a:0033 SINOWEALTH Wired Gaming Mouse
Bus 003 Device 005: ID 0d8c:0005 C-Media Electronics, Inc. Blue Snowball
Bus 003 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 009: ID 0b05:1bca ASUSTek Computer, Inc. ROG Gaming Display Aura Device
Bus 003 Device 012: ID 0bda:1100 Realtek Semiconductor Corp. HID Device
Bus 003 Device 039: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 040: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 041: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 042: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 043: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 003 Device 044: ID 3434:0220 Keychron Keychron K2 Pro
Bus 003 Device 045: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB3.2 Hub

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 001: Dev 004, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 001: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 005, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 009, If 0, Class=Vendor Specific Class, Driver=[none], 12M
        |__ Port 004: Dev 009, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 006: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 002: Dev 039, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 040, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 042, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 042, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 042, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 042, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 044, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 044, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 044, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 045, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 045, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 041, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 041, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 041, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 043, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 043, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 043, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 043, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 043, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 043, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/3p, 5000M

lsusb when combiner U3, KVM U2

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 3434:0b10 Keychron Keychron Q1 HE
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
Bus 001 Device 005: ID 2109:2822 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 006: ID 041e:323b Creative Technology, Ltd Sound Blaster E1
Bus 001 Device 007: ID 04b4:6506 Cypress Semiconductor Corp. CY4603
Bus 001 Device 008: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 009: ID 045e:0659 Microsoft Corp. HoloLens Sensors
Bus 001 Device 010: ID 0bda:4c15 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 011: ID 03f0:0580 HP, Inc QHMD A85V
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB2.1 Hub
Bus 003 Device 004: ID 258a:0033 SINOWEALTH Wired Gaming Mouse
Bus 003 Device 005: ID 0d8c:0005 C-Media Electronics, Inc. Blue Snowball
Bus 003 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 009: ID 0b05:1bca ASUSTek Computer, Inc. ROG Gaming Display Aura Device
Bus 003 Device 012: ID 0bda:1100 Realtek Semiconductor Corp. HID Device
Bus 003 Device 056: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 057: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 058: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 059: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 060: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 003 Device 061: ID 3434:0220 Keychron Keychron K2 Pro
Bus 003 Device 062: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB3.2 Hub

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 001: Dev 004, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 001: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 005, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 009, If 0, Class=Vendor Specific Class, Driver=[none], 12M
        |__ Port 004: Dev 009, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 006: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 002: Dev 056, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 057, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 059, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 059, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 059, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 059, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 061, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 061, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 061, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 062, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 062, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 058, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 058, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 058, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 060, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 060, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 060, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 060, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 060, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 060, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/3p, 5000M

lsusb when combiner U2, KVM U2

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 3434:0b10 Keychron Keychron Q1 HE
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
Bus 001 Device 005: ID 2109:2822 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 006: ID 041e:323b Creative Technology, Ltd Sound Blaster E1
Bus 001 Device 007: ID 04b4:6506 Cypress Semiconductor Corp. CY4603
Bus 001 Device 008: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 009: ID 045e:0659 Microsoft Corp. HoloLens Sensors
Bus 001 Device 010: ID 0bda:4c15 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 011: ID 03f0:0580 HP, Inc QHMD A85V
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB2.1 Hub
Bus 003 Device 004: ID 258a:0033 SINOWEALTH Wired Gaming Mouse
Bus 003 Device 005: ID 0d8c:0005 C-Media Electronics, Inc. Blue Snowball
Bus 003 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 009: ID 0b05:1bca ASUSTek Computer, Inc. ROG Gaming Display Aura Device
Bus 003 Device 012: ID 0bda:1100 Realtek Semiconductor Corp. HID Device
Bus 003 Device 079: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 080: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 081: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 082: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 084: ID 3434:0220 Keychron Keychron K2 Pro
Bus 003 Device 085: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 003 Device 086: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB3.2 Hub

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 001: Dev 004, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 001: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 005, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 009, If 0, Class=Vendor Specific Class, Driver=[none], 12M
        |__ Port 004: Dev 009, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 006: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 002: Dev 079, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 080, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 082, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 082, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 082, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 082, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 084, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 084, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 084, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 085, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 085, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 081, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 081, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 081, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 086, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 086, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 086, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 086, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 086, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 086, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/3p, 5000M

lsusb when combiner U2, KVM U3

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 3434:0b10 Keychron Keychron Q1 HE
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
Bus 001 Device 005: ID 2109:2822 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 006: ID 041e:323b Creative Technology, Ltd Sound Blaster E1
Bus 001 Device 007: ID 04b4:6506 Cypress Semiconductor Corp. CY4603
Bus 001 Device 008: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 009: ID 045e:0659 Microsoft Corp. HoloLens Sensors
Bus 001 Device 010: ID 0bda:4c15 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 011: ID 03f0:0580 HP, Inc QHMD A85V
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB2.1 Hub
Bus 003 Device 004: ID 258a:0033 SINOWEALTH Wired Gaming Mouse
Bus 003 Device 005: ID 0d8c:0005 C-Media Electronics, Inc. Blue Snowball
Bus 003 Device 007: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 009: ID 0b05:1bca ASUSTek Computer, Inc. ROG Gaming Display Aura Device
Bus 003 Device 012: ID 0bda:1100 Realtek Semiconductor Corp. HID Device
Bus 003 Device 093: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 094: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 095: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 096: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 098: ID 3434:0220 Keychron Keychron K2 Pro
Bus 003 Device 099: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 003 Device 100: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 004 Device 002: ID 0b05:1bd7 ASUSTek Computer, Inc. USB3.2 Hub

/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 001: Dev 004, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 001: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 005, If 0, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 1, Class=Audio, Driver=snd-usb-audio, 12M
        |__ Port 002: Dev 005, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 003: Dev 007, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 009, If 0, Class=Vendor Specific Class, Driver=[none], 12M
        |__ Port 004: Dev 009, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 006: Dev 012, If 0, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 002: Dev 093, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 094, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 096, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 096, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 096, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 096, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 098, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 098, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 098, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 099, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 099, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 095, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 095, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 095, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 100, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 100, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 100, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 100, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 100, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 100, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
    |__ Port 001: Dev 002, If 0, Class=Hub, Driver=hub/3p, 5000M

When I view usbtop and look at bus id3 (the kvm), device 16 (Logitech, Inc. Unifying Receiver), has the slowest followed by device 17 ( Keychron Keychron K2 Pro)

lsusb
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 006: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 010: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 011: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 003 Device 014: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 003 Device 016: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 017: ID 3434:0220 Keychron Keychron K2 Pro
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

usbtop
Bus ID 3 (Raw USB traffic, bus number 3)	To device	From device
  Device ID 11 :			722.92 kb/s	1005.96 kb/s
  Device ID 14 :			0.00 kb/s	0.00 kb/s
  Device ID 16 :			6.38 kb/s	7.87 kb/s
  Device ID 17 :			0.00 kb/s	0.00 kb/s

full usb top output

full usb top

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 3434:0b10 Keychron Keychron Q1 HE
Bus 001 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 001 Device 004: ID 058f:6364 Alcor Micro Corp. AU6477 Card Reader Controller
Bus 001 Device 005: ID 2109:2822 VIA Labs, Inc. USB2.0 Hub             
Bus 001 Device 006: ID 041e:323b Creative Technology, Ltd Sound Blaster E1
Bus 001 Device 007: ID 04b4:6506 Cypress Semiconductor Corp. CY4603
Bus 001 Device 008: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 009: ID 045e:0659 Microsoft Corp. HoloLens Sensors
Bus 001 Device 010: ID 0bda:4c15 Realtek Semiconductor Corp. USB Audio
Bus 001 Device 011: ID 03f0:0580 HP, Inc QHMD A85V
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 05e3:0610 Genesys Logic, Inc. Hub
Bus 003 Device 006: ID 09ea:0130 Generic Virtual HUB
Bus 003 Device 010: ID 0d8c:0016 C-Media Electronics, Inc. USB Audio Device
Bus 003 Device 011: ID 194f:0109 PreSonus Audio Electronics, Inc. Studio 24c
Bus 003 Device 014: ID 09eb:0131 IM Networks, Inc. Virtual HID
Bus 003 Device 016: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 017: ID 3434:0220 Keychron Keychron K2 Pro
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

lsusb -t
/:  Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/10p, 480M
    |__ Port 001: Dev 002, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 001: Dev 002, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 004: Dev 003, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 005: Dev 004, If 0, Class=Mass Storage, Driver=usb-storage, 480M
    |__ Port 005: Dev 004, If 1, Class=Human Interface Device, Driver=usbhid, 480M
    |__ Port 008: Dev 005, If 0, Class=Hub, Driver=hub/2p, 480M
        |__ Port 002: Dev 007, If 0, Class=Hub, Driver=hub/4p, 480M
            |__ Port 001: Dev 009, If 2, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 001: Dev 009, If 3, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 001: Dev 009, If 4, Class=Vendor Specific Class, Driver=[none], 480M
            |__ Port 002: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 480M
            |__ Port 002: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 480M
            |__ Port 003: Dev 011, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 009: Dev 006, If 0, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 1, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 2, Class=Audio, Driver=snd-usb-audio, 12M
    |__ Port 009: Dev 006, If 3, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 010: Dev 008, If 0, Class=Wireless, Driver=btusb, 12M
    |__ Port 010: Dev 008, If 1, Class=Wireless, Driver=btusb, 12M
/:  Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/:  Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 480M
    |__ Port 002: Dev 003, If 0, Class=Hub, Driver=hub/4p, 480M
        |__ Port 001: Dev 006, If 0, Class=Hub, Driver=hub/7p, 12M
            |__ Port 001: Dev 010, If 0, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 010, If 1, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 010, If 2, Class=Audio, Driver=snd-usb-audio, 12M
            |__ Port 001: Dev 010, If 3, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 017, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 017, If 1, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 002: Dev 017, If 2, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 014, If 0, Class=Human Interface Device, Driver=usbhid, 12M
            |__ Port 006: Dev 014, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 016, If 0, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 016, If 1, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 002: Dev 016, If 2, Class=Human Interface Device, Driver=usbhid, 12M
        |__ Port 004: Dev 011, If 0, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 011, If 1, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 011, If 2, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 011, If 3, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 011, If 4, Class=Audio, Driver=snd-usb-audio, 480M
        |__ Port 004: Dev 011, If 5, Class=Application Specific Interface, Driver=[none], 480M
/:  Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M

Bus ID 0 (Raw USB traffic, all USB buses)	To device	From device
  Device ID 1 :			0.00 kb/s	0.00 kb/s
  Device ID 4 :			15005.45 kb/s	26.15 kb/s
  Device ID 11 :			722.07 kb/s	1014.84 kb/s
  Device ID 16 :			6.38 kb/s	7.87 kb/s
Bus ID 1 (Raw USB traffic, bus number 1)	To device	From device
  Device ID 1 :			0.00 kb/s	0.00 kb/s
  Device ID 4 :			15005.41 kb/s	26.15 kb/s
  Device ID 10 :			0.00 kb/s	0.00 kb/s
  Device ID 11 :			0.00 kb/s	0.00 kb/s
Bus ID 2 (Raw USB traffic, bus number 2)	To device	From device
  Device ID 1 :			0.00 kb/s	0.00 kb/s
Bus ID 3 (Raw USB traffic, bus number 3)	To device	From device
  Device ID 11 :			722.92 kb/s	1005.96 kb/s
  Device ID 14 :			0.00 kb/s	0.00 kb/s
  Device ID 16 :			6.38 kb/s	7.87 kb/s
  Device ID 17 :			0.00 kb/s	0.00 kb/s
Bus ID 4 (Raw USB traffic, bus number 4)	To device	From device
  Device ID 1 :			0.00 kb/s	0.00 kb/s