[Bug 2121583] [NEW] KDE / Plasma keeps changing speaker source

[Owen]

Public bug reported:

There are two audio output sources on my laptop, one is the internal
speakers and the second is via the DisplayPort. At random intervals
during the day KDE / Plasma will start switching rapidly between the
two, it was particularly apparent today and went on for some minutes.

Both sets of speakers seem to test ok, audio out of all 4 speakers.

When viewed in the Audio section of System Settings the two audio
outputs can be seen rapidly flicking between the two.

As always, happy to collect any more information

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: plasma-desktop 4:5.27.12-0ubuntu0.1
ProcVersionSignature: Ubuntu 6.11.0-28.28~24.04.1-generic 6.11.11
Uname: Linux 6.11.0-28-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.30.0-0ubuntu4.4
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Thu Aug 28 10:27:50 2025
InstallationDate: Installed on 2024-12-13 (258 days ago)
InstallationMedia: Ubuntu 22.04.5 LTS "Jammy Jellyfish" - Release amd64 (20240911)
SourcePackage: plasma-desktop
UpgradeStatus: Upgraded to noble on 2024-12-16 (255 days ago)

** Affects: plasma-desktop (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug noble third-party-packages

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https://bugs.launchpad.net/bugs/2121583

Title:
  KDE / Plasma keeps changing speaker source

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