This bug is awaiting verification that the 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-
hirsute' to 'verification-done-hirsute'. If the problem still exists,
change the tag 'verification-needed-hirsute' to 'verification-failed-
hirsute'.

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: verification-needed-hirsute

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.10 in Ubuntu.
https://bugs.launchpad.net/bugs/1930527

Title:
  [SRU][OEM-5.10/H] UBUNTU: SAUCE: Fix backlight control on Samsung
  16727 panel

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  Invalid
Status in linux-oem-5.10 package in Ubuntu:
  Invalid
Status in linux-oem-5.10 source package in Focal:
  Fix Released
Status in linux source package in Hirsute:
  Fix Committed

Bug description:
  SRU justification:

  [Impact]
  Backlight can't be controlled on 5.11- version of kernel.

  [Fix]
  The panel needs DPCD to get control of backlight.
  After 5.12 kernel introduced new Intel HDR backlight control, and it works 
well
  on this panel.
  Add quirk ID to enable DPCD on 5.11- kernel.

  [Test]
  Vendor Verified on hardware, with this quirk backlight can be changed on 5.10 
and 5.11 kernel.

  [Where problems could occur]
  The panel backlight may not be changed.

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