This feature has been removed in Ubuntu 12.04. Here is the explanation why:
http://web.archive.org/web/20121014092420/http://voices.canonical.com/david.henningsson/2012/04/14 /audio-over-hdmi-and-displayport-in-ubuntu-12-04/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/809678 Title: Pulse should output sound automatically when HDMI cable is plugged To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/809678/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
