Hi.
I want to file a bug report, but I am not familiar with sound system in linux
enough to determine which package is to blame.
So, my issue started only recently. I have a laptop with Debian Testing.
Previously, when I plug in my headset (2x 3.5mm jacks - one for headphones, one
for mic) the system automatically switched to it, both input and output. After
some system update whenever I plug my headset in, Gnome started showing prompt
if I plugged in headphones, headset or external mic, and according to my choice
it configures sound settings.
The issue is that when I have Headphones selected for output and External mic
for input (which correspond to my headset headphones and mic correspondingly),
sound cannot be played via headset’s headphones. Whenever I switch input from
external mic to built-in laptop mic, sound from headphones resumes. But it
results in me being unable to use the headset (as I am unable to use either
headphones or mic).
I believe the issue started after an upgrade which involved linux image update
from 5.3.9-3 to 5.4.8-1. I haven’t been able to confirm that as rolling back to
the older kernel version did not fix the issue, though. I did multiple system
updates before final reboot which exposed the issue, so identifying which
update broke it is very hard.
I have spent some time to rule out PulseAudio as possible cause of the issue.
More details on the issue overall and how I ruled PA out are available in this
thread: http://forums.debian.net/viewtopic.php?f=6&t=144902
I have little understanding on what is involved in the sound system below PA.
ALSA? Kernel? What could be broken and how to debug it?
Any help is appreaciated.
Regards,
-av
