Comment 4 for bug 1243801

Seems like the apparmor profile might be causing this:
[121727.406562] type=1400 audit(1382546334.481:72): apparmor="DENIED" operation="connect" parent=13642 profile="/usr/lib/x86_64-linux-gnu/lightdm-remote-session-uccsconfigure/uccsconfigure-session-wrapper" name="/run/dbus/system
_bus_socket" pid=13777 comm="gnome-session" requested_mask="w" denied_mask="w" fsuid=118 ouid=0
[121727.406665] traps: gnome-session[13777] trap int3 ip:7f2e940013d9 sp:7fff06b119b0 error:0