Can't adjust brightness on Dell Precision 7000 laptop
Bug #1917419 reported by
AceLan Kao
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Undecided
|
AceLan Kao | ||
Hirsute |
Fix Released
|
Undecided
|
AceLan Kao | ||
linux-oem-5.10 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Undecided
|
AceLan Kao |
Bug Description
[Impact]
Screen brightness can't be adjusted. It can't be adjusted via Hotkey and system setting. You can see the value bar changed, but brightness didn't.
[Fix]
Bisect mainine kernel and found below commit in v5.12-rc1 fix the issue.
f12110afee05 drm/i915/dp: Program source OUI on eDP panels
[Test]
Verified on Dell Precision 7000 laptop with DPCD eDP panel.
[Where problems could occur]
It checks the source OUI before writing it, so it won't re-program the source OUI during driver initialization.
CVE References
tags: | added: oem-priority originate-from-1911363 somerville |
description: | updated |
no longer affects: | linux (Ubuntu Focal) |
no longer affects: | linux-oem-5.10 (Ubuntu Hirsute) |
Changed in linux (Ubuntu Hirsute): | |
status: | Incomplete → In Progress |
Changed in linux-oem-5.10 (Ubuntu Focal): | |
status: | New → In Progress |
Changed in linux-oem-5.10 (Ubuntu): | |
status: | New → Invalid |
Changed in linux (Ubuntu Hirsute): | |
assignee: | nobody → AceLan Kao (acelankao) |
Changed in linux-oem-5.10 (Ubuntu Focal): | |
assignee: | nobody → AceLan Kao (acelankao) |
description: | updated |
Changed in linux-oem-5.10 (Ubuntu Focal): | |
status: | In Progress → Fix Committed |
tags: |
added: verification-done-focal removed: verification-needed-focal |
Changed in hwe-next: | |
status: | New → Fix Released |
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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 1917419
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.