Serious sound problems starting occuring about last week, with no particular reason. The problem is that all programs that send sound to PulseAudio, at some point stop playing sound, they continue for a few seconds and then the playback is interrupted. VLC gave an error that source was disconnected. Skype halts.
Then I realized that PulseAudio in keeping one of the two CPUs busy with 80% load.
I am using Ubuntu 12.10 fully updated, 32bit, on a Samsung Q45 with an Intel Sound card
I would appreciate any idea about what is wrong or instructions on how the error can be further traced