Ubuntu
alsa-utils package

  1. Bug #1026331
  2. Comment #12

Comment 12 for bug 1026331

Revision history for this message
Jason E (themanjay) wrote :

This appears to be a duplicate of Bug #878986 and a problem with pulse audio.
using pactl instead is a solution that worked for me.
As documented here.
http://askubuntu.com/questions/118675/mute-key-mutes-alsa-and-pulseaudio-but-unmutes-only-alsa