I have been using Antergos continuously for the last 6 months. I listen to a lot of podcasts and watch videos every day. Until this morning audio output worked flawlessly. When I booted up this morning, suddenly there is no audio output. The volume control applet (I use plasma) indicates “no output or input devices found”. No mute or volume controls are available. I ran alsamixer in terminal and set all available volume controls to 100. The modules for my Intel soundcard are apparently loaded properly. I get “0 snd_hda_intel” when entering “cat /proc/asound/modules”. I reinstalled all alsa and pulseaudio packages, but there is still no audio even after rebooting. Attempting to manually start pulseaudio produces the follwing result:
$ pulseaudio --start
E: [pulseaudio] main.c: Daemon startup failed.
I ran a speaker test
speaker-test -c 2
and noise is emitted from the left and right speakers as it should. I also booted another operating system
and sound works normally. The problem is specific to my Antergos installation.
The sudden occurrence of this problem is perplexing. Everything was working normally just a few hours earlier (before the last shutdown). I would be grateful for any suggestions.