Sometimes can't adjust brightness on Dell AIO
Bug #1862885 reported by
AceLan Kao
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned | ||
Eoan |
Fix Released
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Undecided
|
Unassigned | ||
linux-oem-osp1 (Ubuntu) |
Fix Released
|
Undecided
|
Unassigned | ||
Bionic |
Fix Released
|
Undecided
|
Unassigned |
Bug Description
[Impact]
We already added retry on the backlight driver, but the scalar have to take some time to activate panel during booting up, and 2 seconds seem doesn't enough. So, it sometimes fails to get the response from scalar.
[Fix]
Enlarge the retry time from 2 seconds to 5 seconds.
We didn't observe the response time longer than 3 seconds, but to be more confident, enlarge the value to 5 seconds.
[Test]
Verified on new Dell AIO platform.
[Regression Potential]
Low, increase the retry times doesn't hurt anything.
CVE References
no longer affects: | linux-oem-osp1 (Ubuntu Eoan) |
no longer affects: | linux-oem-osp1 (Ubuntu Focal) |
Changed in linux-oem-osp1 (Ubuntu Bionic): | |
status: | New → Fix Committed |
Changed in linux (Ubuntu Bionic): | |
status: | Incomplete → Fix Committed |
Changed in linux (Ubuntu Focal): | |
status: | Incomplete → Fix Committed |
Changed in linux (Ubuntu Eoan): | |
status: | New → Fix Committed |
tags: |
added: verification-done-bionic verification-done-eoan removed: verification-needed-bionic verification-needed-eoan |
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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 1862885
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.