Just in case this proves useful to others, in my case the problem was solved by adding the indicator applet to the panel. If the messaging menu (an envelope) is missing from your panel, this might be the cause...
-- No sound applet on the gnome panel https://bugs.launchpad.net/bugs/526796 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
