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[Owen <2121583@xxxxxxxxxxxxxxxxxx>]

I have now had an opportunity to try on the stock Ubuntu desktop and
exactly the same is happening there. It also does it at work with
different monitors and cables. The displays themselves do not flicker.
None of the laptop sockets show any signs of physical damage.

I attempted to install Teams, company mandate, using Crossover's WINE.
It promptly removed almost all the DEs (and failed to install Teams!)
and a lot of libraries, including most of the sound libraries. It took
me a while to recover the system, but reinstalling everything to do with
Plasma and the default Ubuntu desktops has made no difference.

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/2121583

Title:
  KDE / Plasma keeps changing speaker source

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  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)
  --- 
  ProblemType: Bug
  ApportVersion: 2.30.0-0ubuntu4.4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  owen       4422 F.... wireplumber
   /dev/snd/controlC0:  owen       4422 F.... wireplumber
   /dev/snd/controlC1:  owen       4422 F.... wireplumber
   /dev/snd/seq:        owen       4418 F.... pipewire
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 24.04
  InstallationDate: Installed on 2024-12-13 (259 days ago)
  InstallationMedia: Ubuntu 22.04.5 LTS "Jammy Jellyfish" - Release amd64 (20240911)
  MachineType: Dell Inc. Precision M4800
  NonfreeKernelModules: nvidia_modeset nvidia
  Package: alsa-driver (not installed)
  ProcVersionSignature: Ubuntu 6.11.0-28.28~24.04.1-generic 6.11.11
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  Tags: noble
  Uname: Linux 6.11.0-28-generic x86_64
  UpgradeStatus: Upgraded to noble on 2024-12-16 (256 days ago)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo
  _MarkForUpload: True
  dmi.bios.date: 06/13/2019
  dmi.bios.release: 65.26
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A26
  dmi.board.name: 0T3YTY
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA26:bd06/13/2019:br65.26:svnDellInc.:pnPrecisionM4800:pvr00:rvnDellInc.:rn0T3YTY:rvrA00:cvnDellInc.:ct9:cvr:sku05CC:
  dmi.product.name: Precision M4800
  dmi.product.sku: 05CC
  dmi.product.version: 00
  dmi.sys.vendor: Dell Inc.

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