another user's comments:
Re: Broken output sound
Your screenshots are the same as mines when i've got that issue.
How it had happened on my system:
- a couple days ago, made the usual daily upgrades from 'proposed',
including gvfs, pulseaudio, alsa and the likes. Sound was working before and
after the upgrades.
- with the next cold boot, i first upgrade some other releases (bionic,
cosmic, bulleyes), the sound was was ok on each ones.
- next cold boot on Disco, kernel 13, and that sound issue appeared; i've
closed and reopened the session, but that did not solved the problem.
- rebooting with the kernel 12 and there the sound was ok; in fact i should
say that the system had found and well identified the mobo sound chipset.
- since, i have made many cold boots and sound is now always working.
So it looks like the upgrade process has disturbed, at boot time,
the sound chipset discovery; is it the gcc8/9 switch to blame ?
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https://bugs.launchpad.net/bugs/1816271
Title:
no sound
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