Comment 25 for bug 1766076

Just got the issue again with latest Bionic kernel (Precision 5520 + TB16):

[253938.395439] xhci_hcd 0000:0e:00.0: ERROR unknown event type 15
[253943.344375] xhci_hcd 0000:0e:00.0: xHCI host not responding to stop endpoint command.
[253943.344704] xhci_hcd 0000:0e:00.0: xHCI host controller not responding, assume dead
[253943.344865] xhci_hcd 0000:0e:00.0: HC died; cleaning up
[253943.344953] usb 3-1: USB disconnect, device number 2
[253943.344955] usb 3-1.1: USB disconnect, device number 3
[253943.344957] usb 3-1.1.1: USB disconnect, device number 6
[253943.344960] usb 3-1.1.1.1: USB disconnect, device number 8
[253943.344963] usb 3-1.1.1.1.4: USB disconnect, device number 10
[253943.345081] usb 4-1: USB disconnect, device number 2
[253943.345083] usb 4-1.1: USB disconnect, device number 3
[253943.345086] usb 4-1.1.1: USB disconnect, device number 5
[253943.346372] usb 4-1.2: USB disconnect, device number 4
[253943.489086] usb 3-1.1.1.3: USB disconnect, device number 13
[253943.556882] usb 3-1.1.1.5: USB disconnect, device number 12
[253943.557415] usb 3-1.1.2: USB disconnect, device number 11
[253943.557687] usb 3-1.1.5: USB disconnect, device number 7
[253943.558220] usb 3-1.3: USB disconnect, device number 4
[253943.558465] usb 3-1.5: USB disconnect, device number 5

uname:

Linux vesho 4.15.0-33-generic #36-Ubuntu SMP Wed Aug 15 16:00:05 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux