I don't get any sound on both VLC and the default movie player on Ubuntu 14.04 while playing both video & audio. But I do get sound when playing audio files via RhythmBox, while browsing on the net and when the logging screen appear.

I've tried:

  1. Installing Ubuntu restricted extras
  2. Reinstall Alsa and Pulse Audio
  3. Update to latest kernel
  4. Disable Auto-Mute through alsamixer setting

But all were in vain!

In Alsamixer setting, pressing F6 gives me the following informations:

-Card: HDA Intel PCH                                  
-Chip: IDT 92HD87B1/3  

How to solve this problem?

  • Try Shift-A, in my case it commutes the audio device. Nov 2 '16 at 13:03

Re-installing a package is a good start, but if often doesn't do enough to bring back all the defaults. Try starting the package more fresh with these steps:

$ sudo apt-get remove --purge alsa-base pulseaudio indicator-sound
$ sudo apt-get install alsa-base pulseaudio indicator-sound
$ sudo alsa force-reload
$ killall pulseaudio; rm -r ~/.config/pulse/* ; rm -r ~/.pulse*; rm ~/.config/pulse

You may have to reboot.

  • Every time I upgrade Ubuntu, sound from my headless machine breaks, and this fixes it.
    – interfect
    May 26 '20 at 5:44

Not sure whether it will work as I have not been in this situation.

Try this:

sudo apt-get install --reinstall vlc

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