My system is an old ASUS netbook.

I installed devuan alpha 2 when it was current, and have upgraded it
regularly. It should be an up-to-date devuan jessie, modulo a few
days.

I've had sound working on this system.

Long ago, with debian all I got was laptop loudspeaker sound.

When I switched to devuan, sound appeared on headphones but never
loudspeaker. This worked around Christmas.

Today I tried using audio again, and all I get is total silence.

Has anything related changed in devuan?

How do I go about diagnosing the problem?

As far as I know, I'm using alsa.

-- hendrik