Comment 16 for bug 1804592

This issue is still present in Ubuntu 20.04.3 LTS running the 5.4.0-81-generic kernel.

[ 0.725170] xhci_hcd 0000:02:00.0: xHCI Host Controller
[ 0.725172] xhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 4
[ 0.725174] xhci_hcd 0000:02:00.0: Host supports USB 3.1 Enhanced SuperSpeed
[ 0.725242] usb usb4: We don't know the algorithms for LPM for this host, disabling LPM.
[ 0.725253] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.04
[ 0.725254] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.725255] usb usb4: Product: xHCI Host Controller
[ 0.725255] usb usb4: Manufacturer: Linux 5.4.0-81-generic xhci-hcd
[ 0.725256] usb usb4: SerialNumber: 0000:02:00.0
[ 0.725340] hub 4-0:1.0: USB hub found
[ 0.725346] hub 4-0:1.0: 2 ports detected