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 1920777
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/1920777
Title:
[G][HWE-5.8] Fix compatibility issue on some external monitors
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
Some external monitors got black screen via HDMI on laptops with Intel GPU.
[Fix]
Reading more of the port caps and dealing with various clock/bpc limitations.
Patchset:
https://patchwork.freedesktop.org/series/72928/
[Test Case]
Verified on the target platform and other 2 laptops include workstation,
Tested on LG/ThinkVision 4k monitors and Dell 1080p monitor, include dock
station.
All good.
[Where problems could occur]
Intel GPU may lose or mess the output.
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