Comment 1 for bug 1211892

After upgrade to lightdm 1.7.7 I can't mount external disks or shutdown the system from the XFCE desktop.
As far as I could find out this is because lightdm doesn't create an active consolekit session therefore authentication for priviledged actions fails.

I went back to lightdm 1.4.0-r2 and the problem was gone.

Reproducible: Always

Steps to Reproduce:
1. upgrade to lightdm 1.7.7
2. restart lightdm
3. login and try to mount a USB disk or shutdown the system
Actual Results:
I get "not authorized" for the mount attempt.
The button for system shutdown is grey.

Expected Results:
mounted disk
coloured and working shutdown button

I've run a complete system upgrade (-uDN) when I came across this bug.
I reverted all changes in consolekit, pam, dbus and what else could have been involved config files:
emerge --noconfmem consolekit pambase shadow sys-fs/udisks sys-power/upower xfce-base/xfce4-session sys-auth/polkit gnome-extra/polkit-gnome udev xfce-base/xfdesktop
But that didn't help either.