You haven't changed any configuration files (e g such as /etc/pulse/default.pa ) so they now reference a hard-coded "source #2", have you?
If not, could you reproduce this with a higher log level (e g by following https://wiki.ubuntu.com/PulseAudio/Log ) and see if you get more information out of this error? Thanks. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1547585 Title: Pulseaudio stopped working but sound still works at the low level (can be controlled with alsamixer) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1547585/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs