[Bug 1937988] Re: The image is distorted while use iGPU rendering and output via AMD GPU

[Łukasz Zemczak]

Hello jeremyszu, or anyone else affected,

Accepted mesa into hirsute-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/mesa/21.0.3-0ubuntu0.3
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
hirsute to verification-done-hirsute. If it does not fix the bug for
you, please add a comment stating that, and change the tag to
verification-failed-hirsute. In either case, without details of your
testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: mesa (Ubuntu Hirsute)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-hirsute

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https://bugs.launchpad.net/bugs/1937988

Title:
  The image is distorted while use iGPU rendering and output via AMD GPU

Status in OEM Priority Project:
  In Progress
Status in mesa package in Ubuntu:
  Fix Committed
Status in mesa source package in Focal:
  Fix Committed
Status in mesa source package in Hirsute:
  Fix Committed

Bug description:
  [Impact]
  Image is distorted with PRIME, caused by mismatch in stride alignment between intel and amdgpu/nvidia after intel bumped the alignment to 256 bytes.

  [Fix]
  Upstream fixed it in 21.2-series, and backport to 21.0.x needs four commits in total.

  [Test case]
  1. Connect a monitor on the AMD GPU.
  2. Power on the system and boot into OS.
  3. Run below command to launch glxgears
  Cmd> DRI_PRIME=1 glxgears -info

  * Expected result
  The image is not distorted while running the glxgears

  * Actual result
  The image is distorted while running the glxgears

  [Where things might go wrong]
  This is a regression caused by the intel driver, so the backports merely fix what got broken. Regressions would only manifest on hybrid graphics platforms.

  
  ---

  Here is the upstream bug for tracking this issue.
  https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/11942?commit_id=505f815e5ead8c9872bbda4c1ff3aeaee7223d64

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