Since I started getting the bug 1766076 xhci failure, this problem has
become more acute as the automatic workaround described in 1766076 no
longer works - when resetting the xhci bus, the bus fails to be set up
properly due to this issue and I'm left with a non-functioning system.

See attached log for when trying to reset the xhci bus while all devices
are connected to the dock.

Currently my recovery procedure is either:
 - reset the bus again (manually) and pray for it to work (it does every 5-6 
times)
 - or manually disconnect the USB chain (I've moved it to the front port so its 
more accessible); reset the bus; wait for everything to settle; count to 5; 
reconnect the USB chain. The counting part is important as if I attach the 
chain too early after the last xhci message in dmesg, it fails to setup with 
the same error as if it was connected during the reset.


** Attachment added: "reset-xhci-failure.log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856161/+attachment/5316520/+files/reset-xhci-failure.log

-- 
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1856161

Title:
  Thunderbolt dock fails to connect USB devices

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856161/+subscriptions

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to