Bug 212641

Overview:

Volume control keys can be seen to change only the Master volume in alsamixer. PCM is at 100 on reboot/switching the output from headphones to speakers.



Actual Results: 

The volume control when using the the Fn + volume keys controls the Master volume in alsamixer, but sound from speakers is either 100% or muted. 

On headphone output the volume is controlled correctly.

On linux-image-5.8.0-48-generic there was speaker sound for only a brief moment right after startup. After that all sound stopped working, even though the visual volume meter in the sound settings showed activity on playback.
 
Upgraded the kernel to linux-image-unsigned-5.11.12-051112-generic on which the sound works seems to work otherwise consistently, except for the volume control, which doesn't work as detailed above.

I have also tried a few different model options in /etc/modprobe.d/alsa-base.conf as e.g. "option snd-hda-intel model=asus-zenbook", but these have had no effect on this issue with the volume control.

Checking hdajackretask under Realtek ALC295 sound card the pins and their assignments look correct (at least based on the naming).

As a further detail (possibly relevant detail as discussed in some other issues linked below), this laptop model has four speakers (two facing up on both sides of the keyboard, two facing down on the bottom part of the chassis) for regular stereo playback. I guess the two facing down should be for "bass" types of sounds.


Could be related to these issues: 
1: https://bugzilla.kernel.org/show_bug.cgi?id=212547
2: https://bugzilla.kernel.org/show_bug.cgi?id=203909
3: https://bugzilla.kernel.org/show_bug.cgi?id=198495
4: https://bugzilla.kernel.org/show_bug.cgi?id=209053


Expected Results: The volume control keys (Fn + volume up/down) and thus master volume would affect all sound playback.



Additional Information:

alsa-info:
http://alsa-project.org/db/?f=922c36344e9e9aba5f48e1f7a1b269333321e591