Ubuntu recommended me to update itself, did it without errors and now... I don't have sound.

• Surprisingly, Spotify still works - it plays the music, but I can control the volume only from within Spotify itself.


• Chrome and Firefox are mute (e.g. when playing videos).


• Volume media keys on keyboard don't work.


• There are no output devices in sound options.


• alsamixer shows 4 empty bars (4x S/PDIF at 00).

I've tried already:

• sudo alsa force-reload


• sudo apt-get install --reinstall alsa-base pulseaudio and then sudo alsa force-reload


• mv ~/.config/pulse ~/.config/old_pulse


• alsactl restore


• sudo apt-get remove timidity --> Package 'timidity' is not installed, so not removed


• "Edit the file found at /usr/share/pulseaudio/alsa-mixer/paths/analog-output-lineout.conf and change any instances of Element (such as [Element Desktop Speaker]) from switch = off to switch = on."


• Adding some stuff to /etc/modprobe.d/blacklist.conf and /etc/modprobe.d/alsa-base.conf


• "go to BIOS -> disable Internal Speakers -> apply changes -> Enable again -> Apply changes -> Exit."

Basically everything reasonable from google. All to no avail. How can I fix it?