Some QHD panels fail to refresh when PSR2 enabled
Bug #2009014 reported by
Chris Chiu
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
HWE Next |
New
|
Undecided
|
Unassigned | ||
linux (Ubuntu) |
Fix Released
|
Medium
|
Unassigned | ||
Jammy |
Invalid
|
Undecided
|
Unassigned | ||
Kinetic |
Fix Released
|
Medium
|
Unassigned | ||
linux-oem-6.1 (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Jammy |
Fix Released
|
Medium
|
Unassigned | ||
Kinetic |
Invalid
|
Undecided
|
Unassigned |
Bug Description
[Impact]
Some QHD (2560x1440) panels which support PSR2 refresh the display abnormally. The display frequently stop responding for few seconds on all user interactions, ex. mouse movement, TTY and any APP GUI. There's no problem on the external monitor. After disabling PSR, the problem will be gone.
[Fix]
Intel release a fix to calculate the wake up line count and configure them into PSR2_CTL accordingly.
[Test]
Verified on the problematic panels to check if the display responds smoothly to mouse movement.
[Where problems could occur]
Only affects the panels on some particular panels which supports PSR2
CVE References
tags: | added: oem-priority originate-from-1999360 somerville |
Changed in linux-oem-6.1 (Ubuntu): | |
status: | New → Invalid |
Changed in linux (Ubuntu Jammy): | |
status: | New → Invalid |
Changed in linux-oem-6.1 (Ubuntu Kinetic): | |
status: | New → Invalid |
Changed in linux (Ubuntu Kinetic): | |
status: | Incomplete → Confirmed |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
status: | New → Confirmed |
Changed in linux (Ubuntu): | |
status: | Incomplete → Confirmed |
importance: | Undecided → Medium |
Changed in linux (Ubuntu Kinetic): | |
importance: | Undecided → Medium |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
importance: | Undecided → Medium |
tags: |
added: verification-done-jammy removed: verification-needed-jammy |
Changed in linux (Ubuntu Kinetic): | |
status: | Confirmed → Fix Committed |
Changed in linux-oem-6.1 (Ubuntu Jammy): | |
status: | Confirmed → Fix Committed |
tags: |
added: verification-done-jammy removed: verification-needed-jammy |
Changed in linux-oem-6.1 (Ubuntu Lunar): | |
status: | New → Confirmed |
Changed in linux (Ubuntu Lunar): | |
status: | New → Confirmed |
importance: | Undecided → Medium |
Changed in linux-oem-6.1 (Ubuntu Lunar): | |
importance: | Undecided → Medium |
no longer affects: | linux-oem-6.1 (Ubuntu Lunar) |
no longer affects: | linux (Ubuntu Lunar) |
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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 2009014
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.