Fix blank screen on Thinkpad ADL 4K+ panel
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Critical
|
AaronMa | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Medium
|
Unassigned | ||
Kinetic |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem-5.14 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Won't Fix
|
Undecided
|
Unassigned | ||
linux-oem-5.17 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Undecided
|
Unassigned |
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.
V2:
[Impact]
Set screen off on ThinkPad P1G5 with 4k+ panel.
The screen will never be back.
[Fix]
Reload link rate as WA to fix the issue.
[Test]
Verified on hardware, screen on/off 20 times OK.
[Where problems could occur]
It may break DP output on Intel platform.
CVE References
tags: | added: oem-priority originate-from-1973260 sutton |
no longer affects: | linux (Ubuntu Focal) |
no longer affects: | linux-oem-5.14 (Ubuntu Jammy) |
no longer affects: | linux-oem-5.17 (Ubuntu Focal) |
Changed in linux (Ubuntu Jammy): | |
status: | New → In Progress |
Changed in linux (Ubuntu): | |
status: | New → In Progress |
Changed in hwe-next: | |
status: | New → In Progress |
assignee: | nobody → AaronMa (mapengyu) |
Changed in linux-oem-5.14 (Ubuntu): | |
status: | New → In Progress |
Changed in linux-oem-5.14 (Ubuntu Focal): | |
status: | New → In Progress |
Changed in linux-oem-5.17 (Ubuntu): | |
status: | New → In Progress |
Changed in linux-oem-5.17 (Ubuntu Jammy): | |
status: | New → In Progress |
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 |
Changed in linux-oem-5.17 (Ubuntu): | |
status: | In Progress → Invalid |
Changed in linux-oem-5.14 (Ubuntu): | |
status: | Won't Fix → Invalid |
description: | updated |
no longer affects: | linux-oem-5.14 (Ubuntu Kinetic) |
no longer affects: | linux-oem-5.17 (Ubuntu Kinetic) |
Changed in linux-oem-5.17 (Ubuntu Jammy): | |
status: | In Progress → Fix Committed |
Changed in hwe-next: | |
importance: | Undecided → Critical |
importance: | Critical → High |
importance: | High → Critical |
Changed in linux (Ubuntu Jammy): | |
importance: | Undecided → Medium |
status: | In Progress → Fix Committed |
Changed in hwe-next: | |
status: | In Progress → Fix Committed |
tags: | added: verification-done-jammy |
Changed in hwe-next: | |
status: | Fix Committed → Fix Released |
tags: |
added: verification-done-jammy removed: verification-needed-jammy |
please don't put the patch email info on the subject, it'll show on the kernel changelog too