Comment 30 for bug 1856608

Hi @jeremyn54

> the error can be consistently reproduced on both signed and testing kernels.

Reproduced on the test kernel? The one that I built in the ppa? If that's the case, then "usb: handle warm-reset port requests on hub resume" might not be to blame after all.

I had a look at your kernel log:

> usb usb4-port2: Cannot enable. Maybe the USB cable is bad?

The bad device is usb4-port2 in your system. The log's don't show what device this is. It only mentions the root hub, and not the device:

usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04
usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb4: Product: xHCI Host Controller
usb usb4: Manufacturer: Linux 5.4.0-42-generic xhci-hcd
usb usb4: SerialNumber: 0000:00:14.0

We need to know what device is plugged into "port 2" of that hub, i.e. "usb 4-2". Can you try determine what the device is?