Comment 0 for bug 2069993

SRU verification for oem-6.8-noble:

[Impact]
In https://bugs.launchpad.net/ubuntu/+source/linux-oem-6.5/+bug/2046315,
we've cherry-picked the 8 patches from the most recent mainline kernel to oem-6.8
to fix the panel flickering problem in the Dell OEM project. However,
OEM reports that the patches don't solve the problem in some machines.

For now, we apply the workaround patches from oem-6.5 to fix the bug.
In the meantime, we've reported the issue to Intel and are waiting for the fix.
Once the fix is available in the mainline kernel, we'll backport the fix into
oem-6.8 kernel and revert the workaround patches.

Upstream bug: https://gitlab.freedesktop.org/drm/intel/-/issues/9739

[Fix]
Apply workaround patches from oem-6.5 to oem-6.8

[Test Plan]
The machines mentioned in the attachment (containing the problematic panel's EDID) would have flickering graphics with the linux-6.8.0-1006-oem kernel.

The flickering graphic is gone after applying the workaround patches.

[Where problems could occur]
The workaround patches add some quirks that disable PSR2 on some panels. So far, there are 7 panels listed in the quirks (other panels used by OEM products are flickering-free without the patches).

If OEM starts using other panels in the future, it's not sure that the panels will be flickering-free.