Can't set xfce4 logout dialog buttons

[Warren Block]

On Mon, 10 Dec 2012, David Demelier wrote:

> I added a file for handling shutdown / reboot for Xfce4, the content is 
> located in 
> /usr/local/etc/polkit-1/localauthority/50-local.d/51-sys-mgmt.pkla.
>
> [Restart]
> Identity=unix-group:operator
> Action=org.freedesktop.consolekit.system.restart
> ResultAny=yes
> ResultInactive=yes
> ResultActive=yes
>
> [Shutdown]
> Identity=unix-group:operator
> Action=org.freedesktop.consolekit.system.stop
> ResultAny=yes
> ResultInactive=yes
> ResultActive=yes
>
> But clicking on the on the logout button, will open the xfce4 dialog and only 
> shows "Logout" all others buttons are grey'ed. I have exactly the same setup 
> on my laptop but with a [Suspend] added, and on my laptop the dialog show 
> Logout and all buttons authorized.
>
> On my both machine my user is in the operator group, so I don't know where I 
> missed something for this machine..

startxfce4 must be called with the --with-ck-launch option.  Then it 
works.