GUI crashed after installed proposed package libegl-mesa0

[Lee Sheng Hung]

[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.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Timo Aaltonen (tjaalton)]

thanks for the bug, could you attach /var/log/kern.log which should contain the dmesg from the failing boot?

[Timo Aaltonen (tjaalton)]

Okay, this is caused by

commit 9c67dde401ea0ceb0c159428d0775948108343fb (HEAD)
Author: Lionel Landwerlin <email address hidden>
Date: Tue May 23 10:00:20 2023 +0300

    intel: reduce minimum memory alignment on Gfx12.5

as we're missing kernel support for it in oem 6.1:

commit 8133a6daad4e72748e239a02775a853ca7ed798b
Author: Matthew Auld <email address hidden>
Date: Tue Oct 4 12:49:14 2022 +0100

    drm/i915: enable PS64 support for DG2

but since oem-6.1 is going away, it's best to just revert the commit from mesa.

[Andreas Hasenack (ahasenack)]

Please amend the test case to test with both the GA and the (affected) 6.1 OEM kernels.

[Andreas Hasenack (ahasenack)]

Hello Lee, or anyone else affected,

Accepted mesa into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/mesa/23.2.1-1ubuntu3.1~22.04.2 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-jammy to verification-done-jammy. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-jammy. 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.

[Timo Aaltonen (tjaalton)]

GA kernel doesn't support DG2, oem-6.1 was the first one, hwe-6.2 does too and works more or less fine (doesn't suffer from this issue)

[Timo Aaltonen (tjaalton)]

tested on my hw, works as planned

[Lee Sheng Hung (jameslee20240115)]

Sorry for the late reply. Proposed package 23.2.1-1ubuntu3.1~22.04.2 amd64 [installed,automatic], GUI displayed normally, thank you for the help!

[Launchpad Janitor (janitor)]

This bug was fixed in the package mesa - 23.2.1-1ubuntu3.1~22.04.2

---------------
mesa (23.2.1-1ubuntu3.1~22.04.2) jammy; urgency=medium

  * patches: Revert a patch that caused GUI fail with OEM-6.1 kernel on
    Intel DG2. (LP: #2051068)

mesa (23.2.1-1ubuntu3.1~22.04.1) jammy; urgency=medium

  * Backport to 22.04. (LP: #2037604)
  * rules: Disable rusticl, FTBFS on jammy.

 -- Timo Aaltonen <email address hidden> Wed, 24 Jan 2024 14:01:34 +0200

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for mesa has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[drouineau (elfunesto)]

Dear all, after the upgrade of mesa packages on monday (23.2.1-1ubuntu3.1~22.04.2 from repo jammy-updates), I suffer similar symptoms at startup (causing a blank screen with no GDM running and message "something went wrong). I am using 22.04.3 LTS "Jammy Jellyfish" with kernel 6.1.0-1034-oem but the issue remains with kernel 6.2.0-26-generic). I have a Dell precision 5480. The issue occurs if I use the nouveau driver or the proprietary nvidia driver (535) with profile "on-demand". The problem is solved with proprietary driver and profile "nvidia" (but costs a lot to the battery lifetime).
I enclose the syslog around the crash which mentions an issue with mesa drivers.

Is this the same issue or should I open a new issue?

[drouineau (elfunesto)]

I also enclose the apt log describing the dist-upgrade that causes the issue