Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-hwe-5.8 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1920777
Title:
[SRU][G][HWE-5.8] Fix compatibility issue on some external monitors
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-hwe-5.8 package in Ubuntu:
Confirmed
Status in linux-hwe-5.8 source package in Focal:
Confirmed
Status in linux source package in Groovy:
Confirmed
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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