This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1961630
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1961630
Title:
Thunderbolt display not working
Status in linux package in Ubuntu:
Incomplete
Bug description:
My Thinkpad X1 Gen4 (20Y5000QUS) using Ubuntu 21.10 is unable to
connect to Thunderbolt monitor (BENQ PD2272OU).
It works as expected (monitor signal + USB devices) when I installed
Windows 10 on the laptop so I have ruled out hardware issues. I have
also tried with a Carbon Gen9 running Ubuntu 21.10 and it works as
expected.
The monitor "BENQ PD2272OU" is detected in the Thunderbolt pane as
"Authorized" but no signal and no USB devices. I have installed all
updates and firmware available in the "Software" app. I have checked
the BIOS and I have "Wake on AC plug" enabled.
At this point I am unsure what to try.
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