Public bug reported:
When opening a snap, sounds being played may start skipping or freezing
and volume changes start failing, it can last from a few milliseconds to
multiple seconds, depending on the program being opened and how the
program playing the sound behaves.
This was observed with Firefox, Chromium, Teams, Retroarch and
Thunderbird snaps, at least.
When opening them, it's possible to see at least 50% iowait on top, htop
shows D for some processes, even pipewire, pipewire-pulse and
wireplumber may iowait.
A way to recreate this is to have some other program playing audio, as
celluloid, and then open a snap or many of them at once for the first
time.
This computer has a 5400 RPM HDD, which surely is part of the problem,
but still, sound freezes when opening the default web browser cause a
very negative experience. I can't reproduce this opening a program
installed as a deb, such as Stellarium, Google Chrome, SuperTuxKart or
even Steam.
I don't remember pulseaudio being so sensitive to iowait.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: pipewire 0.3.48-1ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Fri May 13 22:08:16 2022
InstallationDate: Installed on 2017-06-13 (1795 days ago)
InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: pipewire
UpgradeStatus: Upgraded to jammy on 2019-12-22 (873 days ago)
modified.conffile..etc.cron.daily.apport: [deleted]
** Affects: pipewire (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy third-party-packages
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https://bugs.launchpad.net/bugs/1973389
Title:
Audio freezes, skips and failure to change volume when opening snap
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