ASUS Pro WS TRX50-SAGE WIFI bluetooth driver not working

Software & Operating Systems Linux
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I got myself a Ryzen Threadripper 7980X and a motherboard from Asus, Pro WS TRX50-SAGE WIFI. Most of the things work fine and after updating my Linux kernel to 6.7.0 and added the latest firmware patches from Mediatek I even got WiFi working.

The issue I have is that I can’t for the life of me get bluetooth working. When I contacted Asus support they just flat out told me they don’t support Linux which seems really stupid since it’s a workstation-class motherboard.

Does anyone have any ideas for what I can do to make bluetooth work? It seems to be a MediaTek mt7925 card and it seems to work under Windows. I have also tried applying patches to my kernel that seem relevant (patches from MediaTek mentioning mt7925) without any luck.

The error I see in dmesg is 16 (busy) on the device when sending the first command to it. hci0: Opcode 0x0c03 failed: -16

More info from my debugging sessions:

> usb-devices
T: Bus=07 Lev=01 Prnt=01 Port=10 Cnt=01 Dev#= 4 Spd=480 MxCh= 0
D: Ver= 2.10 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=13d3 ProdID=3602 Rev=01.00
S: Manufacturer=MediaTek Inc.
S: Product=Wireless_Device
S: SerialNumber=000000000
C: #Ifs= 3 Cfg#= 1 Atr=e0 MxPwr=100mA
I: If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=125us
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 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#= 2 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=(none)
E: Ad=0a(O) Atr=03(Int.) MxPS= 64 Ivl=125us
E: Ad=8a(I) Atr=03(Int.) MxPS= 64 Ivl=125us

> rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

> bluetoothctl show
No default controller available

> hciconfig -a
hci0:   Type: Primary  Bus: USB
        BD Address: 00:00:00:00:00:00  ACL MTU: 0:0  SCO MTU: 0:0
        DOWN
        RX bytes:6 acl:0 sco:0 events:1 errors:0
        TX bytes:0 acl:0 sco:0 commands:1 errors:1
        Features: 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00
        Packet type: DM1 DH1 HV1
        Link policy:
        Link mode: PERIPHERAL ACCEPT

> hciconfig hci0 up   
Can't init device hci0: Device or resource busy (16)

Even more data if you want it:
I can’t include links but it’s a github gist that you can access: ulrikstrid/00d191405fdae72aa1cfd06acb69352f

1 Like
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I found a BT patch:

The BT firmware is separate from the WiFi firmware, you may have to fish it out of the Windows driver:
+#define FIRMWARE_MT7925 "mediatek/mt7925/BT_RAM_CODE_MT7925_1_1_hdr.bin"

3

I think that patch has already landed in 6.7.0 but I could be wrong, I will try adding this patch to my kernel to see what it says.
edit: Can confirm that the patch is already applied.

I’m on nixos and created a small package that pulls in the latest firmware from here: git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git. This gives me the following files:

> ls result/lib/firmware/mediatek/mt7925                                              
BT_RAM_CODE_MT7925_1_1_hdr.bin 
WIFI_MT7925_PATCH_MCU_1_1_hdr.bin 
WIFI_RAM_CODE_MT7925_1_1.bin

Is there a way to “force” it to load the firmware?
From my testing mt7925e module gets wifi working, which makes sense since it’s on the PCIe bus (as you pointed out in Discord @rv6502) but then logically the bluetooth should work with mt7825u which is the usb module, but it seems like it’s not pulling in the firmware with tat.

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Did you found a solution for the non working Bluetooth?

5

Unfortunately I have the same exact problem.
Same motherboard, 7970x, there is no way to make the BT work

1 Like
6

Same problem under windows 10pro for me.
I also have a build thread over here

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Hello, sorry I didn’t visit the forum in a bit. I “found” the solution by writing a patch to the Linux kernel that adds the card so that it loads the correct firmware. I’m not sure if this patch has landed in mainline yet but it was accepted by the bluetooth people.

Bluetooth is still “spotty” and the range on my bluetooth connection is much worse than on my laptop even though we have the “shark fin”. I assume this has to be fixed in the firmware however so nothing we as users can do.

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Would you mind sharing your patch?
I cannot even find the right device model in the ASUS manual etc. Quite regret this motherboard, in general.