Public bug reported:
After upgrading from Kubuntu 20.04 to 20.10, PipeWire gets installed and
started along with PulseAudio. As a result, upon system startup some
audio output and input devices are not visible in PulseAudio. For
example, a Builtin audio device might not have analog output or duplex
modes - only digital output. Another audio device might not have 5.1
analog output + analog stereo input mode, but have other modes (e.g.
stereo duplex or digital output). This may not happen the same way every
time - on some start ups some of the devices may be fully visible in
PulseAudio, on others - not.
Presumably, PulseAudio cannot access these devices fully because
PipeWire grabs these devices on startup.
The problem is solved if pipewire and dependent packages are purged from
system.
ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: pipewire (not installed)
ProcVersionSignature: Ubuntu 5.8.0-29.31-lowlatency 5.8.14
Uname: Linux 5.8.0-29-lowlatency x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu50.1
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Sun Nov 22 15:06:10 2020
InstallationDate: Installed on 2015-05-01 (2031 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: pipewire
UpgradeStatus: Upgraded to groovy on 2020-11-22 (0 days ago)
** Affects: pipewire (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug groovy
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https://bugs.launchpad.net/bugs/1905168
Title:
PipeWire conflicts with PulseAudio and hides audio devices
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