This bug is awaiting verification that the linux-oem-6.1/6.1.0-1006.6
kernel in -proposed solves the problem. Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-jammy' to 'verification-done-jammy'. If the
problem still exists, change the tag 'verification-needed-jammy' to
'verification-failed-jammy'.

If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-jammy-linux-oem-6.1

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-6.0 in Ubuntu.
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:
  In Progress
Status in linux-oem-6.1 source package in Jammy:
  In Progress
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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