Same issue on DELL P490 under Intrepid and now Jaunty . (00:1b.0 Audio device: Intel Corporation 631xESB/632xESB High Definition Audio Controller (rev 09))
Interestingly enough the issue happens when muting PCM source in "HDA Intel(Alsa)". The issue does not happen when muting master volume.
Same issue on DELL P490 under Intrepid and now Jaunty . (00:1b.0 Audio device: Intel Corporation 631xESB/632xESB High Definition Audio Controller (rev 09))
Interestingly enough the issue happens when muting PCM source in "HDA Intel(Alsa)". The issue does not happen when muting master volume.