[SRU] Fix acpi backlight issue on some thinkpads
Bug #1892010 reported by
AaronMa
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
Fix Released
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned | ||
Groovy |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem-5.6 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Focal |
Fix Released
|
Medium
|
Unassigned |
Bug Description
[Impact]
On some ThinkPads, the BIOS reported invalid acpi backlight implement .
Then backlight can't be changed because OS use acpi backlight by default.
[Fix]
Check acpi backlight mode, disable it if invalid.
[Test Case]
Verified on 3 models of thinkpad include Intel/NV/AMD GPU with positive results.
[Regression Potential]
Low
Most ThinkPads now use native backlight control by default.
Check the false acpi mode correctly.
CVE References
tags: | added: oem-priority originate-from-1879867 sutton |
no longer affects: | linux-oem-5.6 (Ubuntu Groovy) |
Changed in linux (Ubuntu Groovy): | |
importance: | Undecided → Medium |
status: | Incomplete → Triaged |
Changed in linux-oem-5.6 (Ubuntu): | |
status: | New → Invalid |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
importance: | Undecided → Medium |
status: | New → Triaged |
Changed in linux (Ubuntu Focal): | |
importance: | Undecided → Medium |
status: | New → Triaged |
summary: |
- [SRU][F/OEM-5.6/Groovy] Fix acpi backlight issue on some thinkpads + [SRU] Fix acpi backlight issue on some thinkpads |
Changed in linux (Ubuntu Focal): | |
status: | Triaged → Fix Committed |
Changed in linux-oem-5.6 (Ubuntu Focal): | |
status: | Triaged → Fix Committed |
Changed in hwe-next: | |
status: | New → Fix Released |
To post a comment you must log in.
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 1892010
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.