Public bug reported:

Running Ubuntu 18.04 with the 4.15.0.29 Kernel (the 4.17 line produces several 
ACPI errors and is not really usable for me) on my DELL XPS 13 always results 
in randomly ding Bluetooth and camera.
Dmesg gives the following output

[ 1933.132015] xhci_hcd 0000:00:14.0: xHC is not running.
[ 1933.151360] xhci_hcd 0000:00:14.0: xHCI host controller not responding, 
assume dead
[ 1933.151379] xhci_hcd 0000:00:14.0: HC died; cleaning up
[ 1933.252202] usb 1-5: USB disconnect, device number 4
[ 1933.253443] usb 1-7: USB disconnect, device number 5

Can anybody help?

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1784877

Title:
  USB dies after random time

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