On Fri, Sep 12, 2025 at 01:22:04PM +0100, fraser via Dng wrote:
> Since the last 2 or 3 kernel upgrades, the audio has stopped working,
> unpredictably and starts working, unpredictably. It's not failing
> hardware: two of the laptops fail and then resume at the same time,
> side by side. If it helps, one of them (a Lenovo Thinkpad)
> occasionally screams in pain. Sometimes a fix survives a reboot,
> sometimes not.

Sounds like sometimes your speakers are card0, and sometimes the HDMI
output is card0. What does:

cat /proc/asound/cards

say? What does:

lspci -v |grep Audio

say? What does:

lsmod |grep snd_

say? I'm personally in favor of blowing away pulseaudio and pipewire,
but those may not be what's causing your issues.

Greg


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