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 2012382
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/2012382
Title:
Fix dp-mst failure after re-plug the dock with 2 external monitor
connected
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-6.1 package in Ubuntu:
New
Status in linux source package in Jammy:
Invalid
Status in linux-oem-6.1 source package in Jammy:
In Progress
Bug description:
[Impact]
The dp-mst function is working fine when connecting >2 external monitors via
docking station to the system. But the monitors will fail to display after
re-plug the docking station. The monitors are detected w/o problem but fail to
light up.
[Fix]
Backport one patch from upstream which fix dp-mst.
[Test]
Booting up the system and connect 2 (or more) external monitors to the
docking station and then connect it to the system. Make sure dp-mst function is
working OK on monitors. Re-plug the docking station and make sure the external
monitors still display correctly.
[Where problems could occur]
It fixes the MST payload error in kernel `[drm] *ERROR* Step 2 of creating
MST payload for 00000000a06fb4a4 failed: -5`. It's gone after applying the fix.
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