Enabling of lock screen notifications requires gnome-control-center 3.6, which is not shipped with quantal.
You should however be able to manually enable lock-screen notifications with gsettings with the following command (or use dconf-editor): gsettings set org.gnome.desktop.screensaver show-notifications true -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/1073385 Title: lock screen is missing music controls To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1073385/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs