Public bug reported:
[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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: In Progress
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Jammy)
Status: New => Invalid
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => In Progress
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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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2012382/+subscriptions
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