Public bug reported:

Current version of amdgpu binaries in linux-firmware shipped with ubuntu
22.04 (jammy) and ubuntu 23.10 (mantic) create various problems when
decoding VP9 content with the iGPU on modern AMD mobile processor
(rembrant and phoenix, i.e. 6xxxU/H, 7x40U/H and 7x35U/H processor).

The issue has been reported and solved upstream:

https://gitlab.com/kernel-firmware/linux-
firmware/-/commit/977332782302476e1c863b09b840f463d0378807

Solution dates to the end of February: https://gitlab.com/kernel-
firmware/linux-
firmware/-/commit/977332782302476e1c863b09b840f463d0378807

Ubuntu 24.04 already ships the updated binaries and should not be
affected.

Steps to reproduce:
* on an affected system play a VP9 video with hardware decoding

Additional links:
* 
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=977332782302476e1c863b09b840f463d0378807
* https://bugzilla.redhat.com/show_bug.cgi?id=2267714
* https://www.phoronix.com/news/AMDGPU-Firmware-Fixes-VP9

Workaround:
* download the amdgpu folder from upstream linux-firmware repos
* compress each file with zstd
* copy into /lib/firmware/amdgpu
* regenerate the initrd

I'm currently running ubuntu 23.10 (mantic) with binaries from upstream
and the issue is solved.

** Affects: linux-firmware (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2058830

Title:
  vp9 hw decode broken on modern AMD apus, needs amdgpu update

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