I was able to get it to work by closing down Steam.exe, which appears to be hogging the hardware. There's a bug here somewhere but I'll do some more debugging and work out what the real problem is. Marking 'invalid'.
** Changed in: pulseaudio (Ubuntu) Status: New => Invalid -- Sound is unreliable on MacBook https://bugs.launchpad.net/bugs/413533 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