This seems related to bug 1217196: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1217196
Getting these in ~/.cache/upstart/gnome-settings-daemon.log, as pointed out in comment 39 in the above: (gnome-settings-daemon:19674): GLib-GIO-WARNING **: Dropping signal AcceleratorActivated of type (uuu) since the type from the expected interface is (uu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1242259 Title: Thinkpad x1 Volume up down and mute keys stopped working after upgrade to Ubuntu 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1242259/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs