** Tags removed: verification-needed verification-needed-jammy
** Tags added: verification-done verification-done-jammy

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https://bugs.launchpad.net/bugs/2051068

Title:
  GUI crashed after installed proposed package libegl-mesa0

Status in linux-oem-6.1 package in Ubuntu:
  Invalid
Status in mesa package in Ubuntu:
  Invalid
Status in linux-oem-6.1 source package in Jammy:
  Won't Fix
Status in mesa source package in Jammy:
  Fix Committed

Bug description:
  [Impact]

  OEM-6.1 kernel is missing support for minimum page size of 64k on DG2
  (gfx12.5). Mesa 23.2 started using that, so it broke initializing the
  gpu on boot, causing a blank screen with no GDM running (with wayland,
  and fallback to X failed too).

  [Fix]

  Revert the commit that allows using 64k page size, since that's what
  the current version in jammy-updates is using. OEM-6.1 kernel is going
  away, no need to patch that anymore. No other kernel is affected, >6.2
  works fine and thus this revert is not necessary in mantic or noble.

  [Test case]

  Install the update, boot up a machine with DG2 (iGPU or dGPU, doesn't
  matter). The login screen should appear.

  [Where things could go wrong]
  Hard to see how this could regress anything, as it just restores the limits 
for intel gfx12.5 as they were in the current mesa version in jammy.

  ---

  [Summary]
  After installed proposed package libegl-mesa0, reboot system.

  GUI crashed but still able to access system by ssh.

  [Steps to reproduce]
  1. Boot into OS
  2. sudo apt update
  3. sudo apt upgrade
  4. After upgrade process finished, reboot system.
  5. GUI crashed.

  [Expected result]
  GUI displayed normally

  [Actual result]
  GUI crashed

  [Failure rate]
  100%

  Tester comments
  ---------------
  if we don't upgrade libegl-mesa0, GUI will be fine.

  [Additional information]
  CID: 202303-31429
  SKU: MYBY-DVT2-C5
  Image: dell-bto-jammy-jellyfish-muk-X105-20231026-26_A02.iso
  system-manufacturer: Dell Inc.
  system-product-name: Precision 5680
  CPU: Intel(R) Core(TM) i7-13700H
  kernel-version: 6.1.0-1028-oem

  [Stage]
  Issue reported.

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