Ubuntu
plasma-optimus package

[SRU] plasma-optimus does not always properly detect GPU

Bug #1978502 reported by Erich Eickmeyer on 2022-06-13

This bug affects 2 people

	Status	Importance	Assigned to
plasma-optimus (Ubuntu)	Fix Released	Undecided	Unassigned
Jammy	Fix Released	High	Unassigned
Kinetic	Fix Released	Undecided	Unassigned

Bug Description

[Summary]

Beginning in Plasma 5.24, plasma-optimus would sometimes report the GPU as "undefined" even though the shell script that would detect the GPU would correctly report the GPU too late for the plasmoid due to a race condition inside the plasmoid.

The uploaded fix contains a one-line fix that, if the GPU is still "undefined" the timer re-runs the GPU detection script and gets the proper name of the GPU, thereby resolving the prior race condition.

Affected systems seem to be 12th Generation (Alder Lake) CPUs with Nvidia 30X0 GPUs, but other systems have been anecdotally affected as well.

[Test Plan]

Using an affected system:

* Install Kubuntu

* Install plasma-optimus

* observe "undefined" as the name of GPU chipset currently in use.

[Where problems could occur]

* This is a simple plasmoid and is not likely to break anything system-wide. However, it is possible for the entire plasmoid to cease to work for whatever reason.

* Since it is a plasmoid, and even though it's QML, perhaps, and even though this is highly unlikely, it could break plasma itself. Again, I don't see how this is possible, but I'm playing devil's advocate here.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: plasma-optimus 22.04.2-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-37.39-lowlatency 5.15.35
Uname: Linux 5.15.0-37-lowlatency x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl icp nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Mon Jun 13 13:06:27 2022
InstallationDate: Installed on 2021-03-20 (449 days ago)
InstallationMedia: Ubuntu-Studio 21.04 "Hirsute Hippo" - Alpha amd64 (20210320)
PackageArchitecture: all
SourcePackage: plasma-optimus
UpgradeStatus: Upgraded to jammy on 2021-11-07 (218 days ago)

Tags:

Revision history for this message

Erich Eickmeyer (eeickmeyer) wrote on 2022-06-13:

Dependencies.txt Edit (46.1 KiB, text/plain; charset="utf-8")
ProcCpuinfoMinimal.txt Edit (1.4 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (320 bytes, text/plain; charset="utf-8")

Changed in plasma-optimus (Ubuntu Jammy):
assignee:	nobody → Erich Eickmeyer  (eeickmeyer)
Changed in plasma-optimus (Ubuntu Kinetic):
assignee:	nobody → Erich Eickmeyer  (eeickmeyer)
status:	New → In Progress
Changed in plasma-optimus (Ubuntu Jammy):
status:	New → Triaged

Erich Eickmeyer (eeickmeyer) on 2022-06-13

Changed in plasma-optimus (Ubuntu Kinetic):
status:	In Progress → Fix Committed

Erich Eickmeyer (eeickmeyer) on 2022-06-13

Changed in plasma-optimus (Ubuntu Jammy):
status:	Triaged → In Progress

Erich Eickmeyer (eeickmeyer) on 2022-06-13

tags:

removed: third-party-packages

Revision history for this message

Launchpad Janitor (janitor) wrote on 2022-06-13:

This bug was fixed in the package plasma-optimus - 22.10.1-0ubuntu1

---------------
plasma-optimus (22.10.1-0ubuntu1) kinetic; urgency=medium

* New release 22.10.1
* Fix for proper GPU detection (LP: #1978502)

-- Erich Eickmeyer <email address hidden> Mon, 13 Jun 2022 13:44:06 -0700

Changed in plasma-optimus (Ubuntu Kinetic):
status:	Fix Committed → Fix Released

Erich Eickmeyer (eeickmeyer) on 2022-06-13

Changed in plasma-optimus (Ubuntu Kinetic):
assignee:	Erich Eickmeyer  (eeickmeyer) → nobody
Changed in plasma-optimus (Ubuntu Jammy):
assignee:	Erich Eickmeyer  (eeickmeyer) → nobody
importance:	Undecided → High

Revision history for this message

Erich Eickmeyer (eeickmeyer) wrote on 2022-06-13:

plasma-optimus_22.04.2-0ubuntu1_22.04.2-0ubuntu2.debdiff Edit (2.2 KiB, text/plain)

Revision history for this message

Brian Murray (brian-murray) wrote on 2022-06-14: Please test proposed package

Hello Erich, or anyone else affected,

Accepted plasma-optimus into jammy-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/plasma-optimus/22.04.2-0ubuntu2 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.

Changed in plasma-optimus (Ubuntu Jammy):
status:	In Progress → Fix Committed
tags:	added: verification-needed verification-needed-jammy

Revision history for this message

Erich Eickmeyer (eeickmeyer) wrote on 2022-06-16 (last edit on 2022-06-16):

This has been tested on numerous machines at Kubuntu Focus, and has worked every time. Tested with 20.04.2~0ubuntu2.

tags:

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

Revision history for this message

Launchpad Janitor (janitor) wrote on 2022-06-21:

This bug was fixed in the package plasma-optimus - 22.04.2-0ubuntu2

---------------
plasma-optimus (22.04.2-0ubuntu2) jammy; urgency=medium

* Patch to fix GPU detection (LP: #1978502)

-- Erich Eickmeyer <email address hidden> Mon, 13 Jun 2022 13:58:45 -0700

Changed in plasma-optimus (Ubuntu Jammy):
status:	Fix Committed → Fix Released

Revision history for this message

Brian Murray (brian-murray) wrote on 2022-06-21: Update Released

The verification of the Stable Release Update for plasma-optimus 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.