Fresh install of 18.04 after completely purging 16.04.
Aplay plays audio. Sound test in sound settings works. system sounds work
but browser sound and vlc/video player gives no sound output.
It was working till just before I plugged in hdmi to play on tv
Best Answer
Try to walk through Sound troubleshooting procedure . I'd try step 6 first. Install
pavucontroland look maybe you have some applications muted. Also try changing audio device back and forth.