Strange. After uninstalling the modules from the ppa, reinstalling the backports, and then running pulseaudio in verbose mode, the problem seems to have gone away.
Find attached pulse log anyway. I'll make a new bug if this reappears. ** Attachment added: "pulseverbose.log" https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/663768/+attachment/1702988/+files/pulseverbose.log -- [SigmaTel STAC9221 A1] Sound crackling and jerky playback https://bugs.launchpad.net/bugs/663768 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs