Fix No Sound / Turn Off Auto Mute in Ubuntu 12.10

If your new installation of Ubuntu 12.10 is has no sound or seems to be permanently muted the following may help.

  1. Open Alsamixer by running this command in the terminal(Ctrl+Alt+t):


    Check to see if 'Auto-Mute Mode' is set to 'Enabled' as in the image below, if it is move on the next step to disable it.

  2. Navigate to 'Auto-Mute Mode' with the right arrow key.

    Set 'Auto-Mute Mode' to 'Disabled' with the down arrow key.

    Hopefully you will now have your sound working correctly.