Comment 4 for bug 1798979

> Did this issue start happening after an update/upgrade? Was there a
> prior kernel version where you were not having this particular problem?

As said in the description, it started happening after upgrading from Kubuntu 18.04 to 18.10. 18.04 has kernel 4.15.

> Would it be possible for you to test the latest upstream kernel?

The problem reproduces with kernel 4.19 rc8. The is the dmesg lines that start appearing when the problem happens:

[ 136.161611] xhci_hcd 0000:05:00.0: WARN Cannot submit Set TR Deq Ptr
[ 136.161615] xhci_hcd 0000:05:00.0: A Set TR Deq Ptr command is pending.
[ 136.293090] usb 6-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd
[ 166.865743] xhci_hcd 0000:05:00.0: WARN Cannot submit Set TR Deq Ptr
[ 166.865747] xhci_hcd 0000:05:00.0: A Set TR Deq Ptr command is pending.
[ 167.001317] usb 6-1: reset SuperSpeed Gen 1 USB device number 2 using xhci_hcd