google brought me here, but it may or may not be related. I found that it was not dsp that was occupied, but that firefox (very likely the flash plugin) was blocking /dev/sound/pcm[something].
-- /dev/dsp busy, but no program using it https://launchpad.net/bugs/76876 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
