failed to initialize audio driver 'pulse'

Questo è l'errore che ho trovato nell'avviare mplayer senza interfaccia grafica..:

AO: [pulse] Init failed: Connection terminated  Failed to initialize audio driver ‘pulse’
waitpid(): No child processes
[AO_ALSA] alsa-lib: pulse.c:229:(pulse_connect) PulseAudio: Unable to connect: Internal error
[AO_ALSA] Playback open error: Connection refused
Failed to initialize audio driver ‘alsa’
[AO OSS] audio_setup: Can’t open audio device /dev/dsp: No such file or directory
[AO_ALSA] alsa-lib: pulse.c:229:(pulse_connect) PulseAudio: Unable to connect: Connection refused


 ..l'ho risolto installando pulseaudio-module-x11.

root@localhost:~#apt-get install pulseaudio-module-x11