No sound watching a DVD
I've been trying to watch a DVD using Xine, and it seems to load and play okay except that there's no sound.
I checked to see if I'd kicked the plug out, and sure enough I had, but even after I fixed that I still get no sound. The message I see in the console is:
audio_alsa_out: snd_pcm_open() of front failed: Invalid argument
audio_alsa_out: >>> check if another program don't already use PCM <<<
...over and over and over!
I did a ps -A and didn't see anything called PCM or pcm or anything like that.