Looking at your data, it looks like skype has a low-latency stream running. I e, killing skype should also fix the issue.
Unfortunately, skype is closed source software, so not sure how to fix the root cause. ** Package changed: pulseaudio (Ubuntu) => skype (Ubuntu) ** Changed in: skype (Ubuntu) Status: Incomplete => Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1345096 Title: pulseaudio uses too much cpu for doing nothing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/skype/+bug/1345096/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs