When I start up my computer and play audio, the sound volume decreases in a few seconds and gets reduced to no sound output. When I start to play sound after nothing has been streamed for some 10 seconds, it repeats the volume decrease. In PulseAudio Volume Control everything looks normal.
This began after the last update. Sound output was functioning normally before. I have tried reinstalling alsa-base and pulseaudio and rebooted several times, but no change. Any idea for a fix?