I just started experiencing this issue again, last week. Same hardware: Precision 5520 with thunderbolt dock Dell TB-16. Kernel 5.11.0-22-generic on hirsute.
---8<--- Jun 27 14:53:11 vesho kernel: xhci_hcd 0000:0e:00.0: ERROR unknown event type 15 Jun 27 14:53:16 vesho kernel: xhci_hcd 0000:0e:00.0: xHCI host not responding to stop endpoint command. Jun 27 14:53:16 vesho kernel: xhci_hcd 0000:0e:00.0: USBSTS: Jun 27 14:53:16 vesho kernel: xhci_hcd 0000:0e:00.0: xHCI host controller not responding, assume dead Jun 27 14:53:16 vesho kernel: xhci_hcd 0000:0e:00.0: HC died; cleaning up Jun 27 14:53:16 vesho kernel: usb 3-1: USB disconnect, device number 2 Jun 27 14:53:16 vesho kernel: usb 3-1.1: USB disconnect, device number 3 Jun 27 14:53:16 vesho kernel: usb 3-1.1.1: USB disconnect, device number 5 Jun 27 14:53:16 vesho kernel: usb 3-1.1.1.4: USB disconnect, device number 7 Jun 27 14:53:16 vesho kernel: usb 4-1: USB disconnect, device number 2 Jun 27 14:53:16 vesho kernel: usb 4-1.1: USB disconnect, device number 3 Jun 27 14:53:16 vesho kernel: usb 4-1.2: USB disconnect, device number 4 Jun 27 14:53:16 vesho kernel: usb 3-1.1.4: USB disconnect, device number 6 Jun 27 14:53:16 vesho kernel: usb 3-1.1.5: USB disconnect, device number 9 Jun 27 14:53:16 vesho kernel: usb 3-1.5: USB disconnect, device number 4 Jun 27 14:53:16 vesho kernel: usb 3-1.6: USB disconnect, device number 8 Jun 27 14:53:16 vesho kernel: usb 3-1.6.4: USB disconnect, device number 10 Jun 27 14:53:16 vesho kernel: usb 3-1.6.5: USB disconnect, device number 11 ---8<--- -- 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
