This is a very ambiguous topic and I suspect it is actually two or more bugs. However, it seems to me that one fix (mentioned bygynoid, kingaaronj, ttp and which also helped me) is definitive and would be as follows.
When choosing a default sound device in gnome-sound-properties, it should also change the default PulseAudio device as does the padevchooser package. ** Also affects: gnome-control-center Importance: Undecided Status: New -- 9.04 flash player no sound after upgrade https://bugs.launchpad.net/bugs/367173 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