"Occasionally in Ubuntu Linux, some application hogs the pulseaudio sound server causing other programs like vlc and mplayer to not be able to actually play sound. There is a simple fix for this problem and it can be found at the command prompt level.
work around found on the web:
"Occasionally in Ubuntu Linux, some application hogs the pulseaudio sound server causing other programs like vlc and mplayer to not be able to actually play sound. There is a simple fix for this problem and it can be found at the command prompt level.
Open up BASH and do the following...
mousecrash$ sudo pkill -9 pulseaudio
mousecrash$ pulseaudio"