I'm pretty sure I have tracked this problem down to a problem with
pipewire and/or alsa.
After changing the notification sound from "default" to "none" in the
Genome settings, the terminal hangs seem to be gone. Firefox still
hangs, however (not surprisingly so, since it shouldn't be affected by
Gnome settings at all).
Gnome settings shows no audio output devices. "aplay -L", on the other
hand, *does* show devices. So the problem seems to be caused by pipewire
(which replaced pulseaudio in Ubuntu 24.04 as far as I know).
Interestingly, running "alsamixer" in a terminal also hangs.
I have checked pipewire-pulse and wireplumber with systemctl --user, and
both services seem to be running.
** Also affects: pipewire (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2081281
Title:
gnome terminal and other apps freezes for about 30 seconds
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