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pulseaudio - man pages section 1: User Commands
https://docs.oracle.com/cd/E88353_01/html/E37839/pulseaudio-1.html
--cleanup-shm Identify stale PulseAudio POSIX shared memory segments in /dev/shm and remove them if possible. This is done implicitly whenever a new daemon starts up or a client tries to connect to a daemon.
pulseaudio(1) — Arch manual pages
https://man.archlinux.org/man/pulseaudio.1
Identify stale PulseAudio POSIX shared memory segments in /dev/shm and remove them if possible. This is done implicitly whenever a new daemon starts up or a client tries to connect to a daemon. It should normally not be necessary to issue this command by hand.
PulseAudio/Examples - ArchWiki - Arch Linux
https://wiki.archlinux.org/title/PulseAudio/Examples
Restart PulseAudio, run pavucontrol and select the "Output Devices" tab. Three settings should be displayed: Internal Audio Digital Stereo (HDMI) Internal Audio Simultaneous output to Internal Audio Digital Stereo (HDMI), Internal Audio Now start a program that will use PulseAudio such as MPlayer, VLC, mpd, etc. and switch to the "Playback" tab.
In ubuntu, Pulseaudio locks memory /dev/shm, jack problems ...
https://linuxmusicians.com/viewtopic.php?t=2790
In ubuntu, Pulseaudio locks memory /dev/shm, jack problems. Many users with non-bleeding-edge computers, typically Pentium with 512 MB RAM and cheap integrated audio card try to use jack and linux audio programs. However, they sometimes get stuck with the problem described in the subject, resulting in jack failure and generally, weird behaviour.
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