** Changed in: hwe-next
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/1917419
Title:
Can't adjust brightness on Dell Precision 7000 laptop
Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux-oem-5.10 source package in Focal:
Fix Released
Status in linux source package in Hirsute:
Fix Released
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.
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