Possible duplicate of: "Master" volume control not controlling output volume level
After the computer falls asleep, sound won't work until I open the Sound Settings menu.
If I open this via terminal using gnome-control-center sound, the process runs, but then a second process seems to start up and displays the error message
(unity-control-center:5161): sound-cc-panel-WARNING **: Unable to find stream for bar '(null)'
(unity-control-center:5161): sound-cc-panel-WARNING **: active_output_update - couldn't find a stream from the supposed active output
Please help me to fix this issue.
