No Restart/Shutdown (ConsoleKit=yes; display manager=no).

Hi, I've installed a minimal F17 system (building it up gradually) with Xfce 4.10. I have both ConsoleKit and ConsoleKit-x11 installed but 'Restart' and 'Shutdown' are grayed out. I'm starting xfce with startx. It has #!/bin/sh exec ck-launch-session startxfce4 (but I think 'ck-launch-session' isn't even needed as /etc/xdg/xfce4/xinit checks for that) I have only xfconf, xfce4-session, xfwm4 and xfce4-panel (plus dependencies libxfce4ui and libxfce4util and two extras: xfce4-notifyd and the clipman plugin). I haven't installed xfdesktop nor xfce4-settings. If anyone has any idea what may be the issue, please tell. I may ask at the Xfce forum too, though. Tks.