** Changed in: linux-oem-5.14 (Ubuntu)
Status: In Progress => Won't Fix
** Changed in: linux-oem-5.14 (Ubuntu Focal)
Status: In Progress => Won't Fix
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https://bugs.launchpad.net/bugs/1980621
Title:
[SRU][OEM-5.14/Jammy/OEM-5.17][PATCH 0/1] Fix blank screen on Thinkpad
ADL 4K+ panel
Status in HWE Next:
In Progress
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
Won't Fix
Status in linux-oem-5.17 package in Ubuntu:
In Progress
Status in linux-oem-5.14 source package in Focal:
Won't Fix
Status in linux source package in Jammy:
In Progress
Status in linux-oem-5.17 source package in Jammy:
In Progress
Bug description:
[Impact]
Set screen off on ThinkPad P1G5 with 4k+ panel.
The screen will never be back.
[Fix]
It's a upstream kernel regression.
And reverted by upstream.
[Test]
Verified on hardware, screen on/off 20 times OK.
[Where problems could occur]
Low risk, it reverts a regression and may break i915 driver.
On 5.14-oem and Jammy kernel, This commit was claimed to backport
commit 73867c8709b5 ("drm/i915/display: Remove check for low voltage sku for
max dp source rate")
But it's not kind of it.
So revert it instead.
On 5.17 kernel, revert it by upstream commit.
Unstable kernel already got it.
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