Public bug reported:
[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
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Tags: oem-priority originate-from-1999360 somerville
** Also affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Tags added: oem-priority originate-from-1999360 somerville
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https://bugs.launchpad.net/bugs/2009014
Title:
Some QHD panels fail to refresh when PSR2 enabled
Status in HWE Next:
New
Status in linux-oem-6.1 package in Ubuntu:
New
Status in linux-oem-6.1 source package in Jammy:
New
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
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