Missing sound after updating form 14.10 to 15.04, installing "Ubuntu restricted extras" doesn’t help. Is there a way fix this or easy way to rollback to 14.10?
I also had the same issue after install 15.04. But managed to fix it by reinstalling Alsa and Pulse Audio. Also, I had to increase volume with Alsamixer.
This article explain everything nicely.
I've seen this happen in two ways:
- check in pulseaudio if you have multiple output sources that are not plugged in, and the wrong one is selected as primary. (go to configuration and turn everything you're not using off)
- an application already binded to a specific sound source. Restart that application after doing the above