despues de actualizar no tengo audio en ubuntu 13.10

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Hoy temprano por la mañana reaice una actualizacion de sistema, y despues al querer ver un video por youtube no tenia audio verifianco el volumen, comprobe esto con un video que tenia en el pc y nada...no tenia audio....entre a la configuración del sistema y luego a audio y note que donde dice REPRODUCIR SONIDO A TRAVES DE: dice sonido para torpes lo que antes no me salia.

al momento de actualizar no arrojo ningun error. les dejo lo que me arroja al momento de realizar el update

Already have key 72B194E5 for archive alsa-daily by ~ubuntu-audio-dev
Already have key 8844C542 for archive ppa by ~xorg-edgers
DONE
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