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 2002968
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.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Jammy)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/2002968
Title:
Fix flicker display problem on some panels which support PSR2
Status in HWE Next:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem-6.0 package in Ubuntu:
New
Status in linux-oem-6.1 package in Ubuntu:
New
Status in linux source package in Jammy:
Incomplete
Status in linux-oem-6.0 source package in Jammy:
New
Status in linux-oem-6.1 source package in Jammy:
New
Status in linux source package in Lunar:
Incomplete
Status in linux-oem-6.0 source package in Lunar:
New
Status in linux-oem-6.1 source package in Lunar:
New
Bug description:
[Impact]
On some PSR2 supported panels, which connects to Intel Graphics has flicker
symptom. It gets normal after booting the kernel with parameter `i915.
enable_psr=0`
[Fix]
Backport one patch from upstream.
https://cgit.freedesktop.org/drm-tip/commit/drivers/gpu/drm/i915/display/intel_psr.c?id=084aab04cc60e5eab32287d0483c33e12c92da87
[Test]
Booting the patched kernel with problematic panel (LGD LCD_VD78M), check if
the display has abnormal flickering problem on graphics interfaces.
[Where problems could occur]
The risk of regression is low. It only fixes problem on panels which support
PSR2.
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