Every 5-20 minuets I receive pop-up system mesage like quoted below and my headphones become muted. I have to go to pulseaudio settings or to volume settings and to switch back to Built-in Audio Analog Stereo and to set Port to headphones. After this operation I’m able to enjoy music for several minuets before the next message about:
The audio playback device Built-in Audio Analog Stereo does not work. Falling back to Built-in Audio Digital Stereo (IEC958).
Actually I solved the problem after some googling. I’ve changed pulseaudio config for the headphones at /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf
My headphones are connected to the front pannel so I changed
[Jack Front Headphone]
required-any = any
to:
[Jack Front Headphone]
#required-any = any
Don’t know if this is configurable without superuser privileges
Here is pactl info, if it is still relevant
Server String: unix:/run/user/1000/pulse/native
Library Protocol Version: 31
Server Protocol Version: 31
Is Local: yes
Client Index: 38
Tile Size: 65472
Server Name: pulseaudio
Server Version: 9.0-rebootstrapped
Default Sample Specification: s16le 6ch 44100Hz
Default Channel Map: front-left,front-right,rear-left,rear-right,front-center,lfe
Default Sink: alsa_output.pci-0000_00_14.2.analog-stereo
Default Source: alsa_input.usb-046d_0825_571FAAC0-02.analog-mono
Cookie: b397:9f5c