Hey! I’ve been having some strange issues with my l1 kvm lately. When switching between my M2 mac and my Linux box, after several switches I get the following messages in the kernel log and after that the mouse/keyboard plugged into the kvm stop working.
plugging the devices straight into the Linux machine still works, but nothing I do to the KVM seems to help. I also tried switching the KVM to a different USB port on the Linux machine but that also doesn’t resolve matters. Neither does “rebooting” the KVM by power cycling it.
As an aside, something that might be useful for someone, I found that if the mac and linux don’t use the same refresh rates on my screens (Acer Nitro XV273KPbmiipphzx) the firmware crashes when switching screens. It’s very annoying 
but probably not the KVM’s fault!
Nov 17 19:30:29 lilly kernel: usb 1-1.2: new full-speed USB device number 15 using xhci_hcd
Nov 17 19:30:52 lilly kernel: xhci_hcd 0000:23:00.0: Abort failed to stop command ring: -110
Nov 17 19:30:52 lilly kernel: xhci_hcd 0000:23:00.0: xHCI host controller not responding, assume dead
Nov 17 19:30:52 lilly kernel: xhci_hcd 0000:23:00.0: HC died; cleaning up
Nov 17 19:30:52 lilly kernel: xhci_hcd 0000:23:00.0: Timeout while waiting for setup device command
Nov 17 19:30:52 lilly kernel: usb 1-1: USB disconnect, device number 2
Nov 17 19:30:52 lilly kernel: usb 2-1: USB disconnect, device number 2
Nov 17 19:30:53 lilly kernel: usb 1-1.2: device not accepting address 15, error -108
Nov 17 19:30:53 lilly kernel: usb 1-1-port2: couldn't allocate usb_device
Nov 17 19:30:53 lilly kernel: usb 1-1.3: USB disconnect, device number 4
Nov 17 19:30:53 lilly kernel: usb 1-1.3.1: USB disconnect, device number 5
Nov 17 19:30:53 lilly kernel: usb 1-1.3.6: USB disconnect, device number 6