Suddenly & without warning, I lost playback audio in Ubuntu 12.04. No startup sound, no MP3's, no YouTube audio. I downloaded the Pulse Audio Volume Control application; it animates sound that is supposed to be playing.
My system is dual-boot. When I boot into Windows Vista, I get the sound, but it stutters; that is, I get a half-second of sound, followed by an instant of silence, and this sequence repeats, yielding a choppy sound, as though coming from the other side of a spinning fan.
Finally I tried a Fedora LiveUSB. Sound is fine.
I'm mostly concerned with Ubuntu here, as that is my primary system. I include the output of the
aplay -l command below. Thanks in advance.
[root@localhost liveuser]# aplay -l **** List of PLAYBACK Hardware Devices **** card 0: NVidia [HDA NVidia], device 0: ALC268 Analog [ALC268 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: NVidia [HDA NVidia], device 1: ALC268 Digital [ALC268 Digital] Subdevices: 1/1 Subdevice #0: subdevice #0
Update: In the morning I booted into Ubuntu and all sound worked fine. I booted into Windows and the sound was working there too. Then I booted back into Ubuntu and they were no longer working.