I haven't had that issue for a while, since kernel 4.20, I think, but I just had this issue again, on up to date 19.04 with kernel 5.0.0-13:
[376539.800632] xhci_hcd 0000:0e:00.0: ERROR unknown event type 15 [376544.914548] xhci_hcd 0000:0e:00.0: xHCI host not responding to stop endpoint command. [376544.914869] xhci_hcd 0000:0e:00.0: xHCI host controller not responding, assume dead [376544.914937] xhci_hcd 0000:0e:00.0: HC died; cleaning up [376544.914941] usb 3-1.5: Failed to suspend device, error -22 [376544.914948] usb 4-1.1.1: Failed to suspend device, error -22 [376544.914956] usb 3-1: USB disconnect, device number 2 [376544.914957] usb 3-1.1: USB disconnect, device number 3 [376544.914958] usb 3-1.1.1: USB disconnect, device number 5 [376544.914959] usb 3-1.1.1.4: USB disconnect, device number 8 [376544.915173] usb 4-1: USB disconnect, device number 2 [376544.915174] usb 4-1.1: USB disconnect, device number 3 [376544.915175] usb 4-1.1.1: USB disconnect, device number 5 [376544.915595] usb 4-1.2: USB disconnect, device number 4 [376544.958908] usb 3-1.1.1.5: USB disconnect, device number 11 [376544.959744] usb 3-1.1.2: USB disconnect, device number 7 [376544.959746] usb 3-1.1.2.4: USB disconnect, device number 10 [376545.175240] usb 3-1.1.5: USB disconnect, device number 9 [376545.175890] usb 3-1.5: USB disconnect, device number 6 [376545.176578] usb 3-1.6: USB disconnect, device number 12 Then the USB hub died while DP over Thunderbolt monitors continue to work. Firmware versions: Precision M5520 Thunderbolt Controller: 26.01 Dell Thunderbolt Dock: 16.00 Precision 5520 System Firmware: 0.1.13.0 This has happened a few times already - as I was writing up this report - and I worked around them by either power cycling the dock (pulling the power cable - the power button on the dock powers down the laptop), or running the XHCI reset script I'm pasting below. Regarding other workarounds - at no point did I boot to MS-Windows (or at least not in the last half a year). This is the XHCI reset script I'm using - it lists XHCI devices and runs the unbind-rebind process specified in the original bug report. The next step would be a SystemD service that monitors the kernel log for the "xHCI assume dead" line and triggers the rebind automatically :-/ ``` #!/bin/bash tbtid="$(ls /sys/bus/pci/drivers/xhci_hcd/ | grep '[0-9]')" echo "Resetting thunderbolt bus">&2 for id in $tbtid; do echo -n $id > /sys/bus/pci/drivers/xhci_hcd/unbind done sleep 1 for id in $tbtid; do echo -n $id > /sys/bus/pci/drivers/xhci_hcd/bind done echo "Done resetting thunderbolt bus">&2 ``` -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766076 Title: USB over thunderbolt turns off every once in a while To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1766076/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
