Ubuntu
mesa package

GPU acceleration via VirGL is broken in qemu

Bug #2038834 reported by Mate Kukri on 2023-10-09

This bug affects 2 people

	Status	Importance	Assigned to
Release Notes for Ubuntu	New	Undecided	Unassigned
mesa (Ubuntu)	Fix Released	Undecided	Unassigned
Mantic	Fix Released	Undecided	Unassigned
Noble	Fix Released	Undecided	Unassigned

Bug Description

[ Impact ]
* Enabling GPU acceleration can cause host-side crashes on mantic/noble VMs

* This was reported by someone else upstream and is already fixed by
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25580.

[ Test Plan ]

* I've tested the patch on an affected macOS host running Ubuntu in UTM with
OpenGL enabled on both Mantic and Noble VMs.

* Anyone else can do the same on an affected host by simply installing the
patched package and booting to the desktop.

[ Where problems could occur ]

* This patch fixes an upstream mesa regression which caused libvirglrendrer to
crash on the host side.

* This makes a non-working use case work, VirGL on affected hosts cannot
regress as it simply didn't work before.

* Risk of breakage is mainly from other packages possible affected by a mesa
rebuild.

See original description

Tags:

Mate Kukri (mkukri) on 2023-10-09

Changed in mesa (Ubuntu):
milestone:	none → ubuntu-23.10

Mate Kukri (mkukri) on 2023-10-09

Changed in mesa (Ubuntu):
milestone:	ubuntu-23.10 → none

Revision history for this message

Launchpad Janitor (janitor) wrote on 2023-10-19:

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

Changed in mesa (Ubuntu):
status:	New → Confirmed

Revision history for this message

Mate Kukri (mkukri) wrote on 2023-11-08:

1-23.2.1-1ubuntu4.debdiff Edit (3.0 KiB, text/plain)

This integrates the patch for this bug from upstream.

Revision history for this message

Ubuntu Foundations Team Bug Bot (crichton) wrote on 2023-11-08:

The attachment "1-23.2.1-1ubuntu4.debdiff" seems to be a debdiff. The ubuntu-sponsors team has been subscribed to the bug report so that they can review and hopefully sponsor the debdiff. If the attachment isn't a patch, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are member of the ~ubuntu-sponsors, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issue please contact him.]

tags:

added: patch

Mate Kukri (mkukri) on 2023-11-15

description:

updated

Mate Kukri (mkukri) on 2023-11-16

Changed in mesa (Ubuntu Noble):
status:	Confirmed → Fix Released

Revision history for this message

Sergio Durigan Junior (sergiodj) wrote on 2023-11-16:

Hello Mate,

I see that the debdiff you provided applies to Noble, but this bug is also marked as affecting Mantic. Could you provide an updated debdiff for the Mantic version? Thanks!

Revision history for this message

Mate Kukri (mkukri) wrote on 2023-11-17:

Hi @sergiodj,

I believe it was already uploaded, and is currently in the unapproved queue: https://launchpadlibrarian.net/697888277/mesa_23.2.1-1ubuntu3_23.2.1-1ubuntu3.1.diff.gz

The difference to noble is purely the version number being ubuntu3.1 instead of ubuntu4.

Mate

Revision history for this message

Steve Langasek (vorlon) wrote on 2023-11-28: Please test proposed package

Hello Mate, or anyone else affected,

Accepted mesa into mantic-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/mesa/23.2.1-1ubuntu3.1 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-mantic to verification-done-mantic. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-mantic. 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 Mantic):
status:	New → Fix Committed
tags:	added: verification-needed verification-needed-mantic

Revision history for this message

Ubuntu SRU Bot (ubuntu-sru-bot) wrote on 2023-11-28: Autopkgtest regression report (mesa/23.2.1-1ubuntu3.1)

All autopkgtests for the newly accepted mesa (23.2.1-1ubuntu3.1) for mantic have finished running.
The following regressions have been reported in tests triggered by the package:

asymptote/2.86+ds-1 (armhf)
clutter-1.0/1.26.4+git2779b932+dfsg-5 (armhf)
freeglut/3.4.0-1 (armhf)
gle/3.1.0-10 (armhf)
glfw3/3.3.8-1 (armhf)
gtk+3.0/3.24.38-5ubuntu1 (armhf)
libcsfml/2.5-1.1 (armhf)
libsdl2/2.28.3+dfsg-2 (armhf)
mutter/45.0-3ubuntu3.1 (armhf)
njplot/2.4-9 (armhf)
vtk9/9.1.0+really9.1.0+dfsg2-7 (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/mantic/update_excuses.html#mesa

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

Revision history for this message

Mate Kukri (mkukri) wrote on 2023-12-01:

The autopkgtest regression above are due to armhf autopkgtest runner faults. The tests have been re-triggered and should succeed.

Confirmed to fix VirGL graphics acceleration on my previously affected machine.

tags:

added: verification-done verification-done-mantic
removed: verification-needed verification-needed-mantic

Revision history for this message

Launchpad Janitor (janitor) wrote on 2023-12-05:

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

---------------
mesa (23.2.1-1ubuntu3.1) mantic; urgency=medium

* patches: Avoid crashing virglrenderer when the host doesn't support
PIPE_CAP_CLEAR_TEXTURE (LP: #2038834)

-- Mate Kukri <email address hidden> Tue, 07 Nov 2023 15:41:32 +0200

Changed in mesa (Ubuntu Mantic):
status:	Fix Committed → Fix Released

Revision history for this message

Timo Aaltonen (tjaalton) wrote on 2023-12-05: Update Released

#10

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.