Hi,
I think this bug is fixed by the today's pulseaudio 12.2-3 update in Debian:
* Ship link from /etc/alsa/conf.d/pulse.conf to
/usr/share/alsa/alsa.conf.d/pulse.conf.
Upstream alsa decided to stop supporting the /usr path (Closes:
#915696)
I cannot test right now, but only this week-end.
Regards,
--
Eugen