I was tinkering with SELinux, installed the reference profile and after a reboot I was asked for the root password to mount usb drives, refresh the repos (through apper), suspend the system and to shutdown and reboot it. I manage to get most things back to normal by copying the polkit configuration files in the liveusb image (the ones in /usr/share/polkit-1/ and /var/lib/polkit-1). However it wasn’t enough since I’m still asked for the password when I try to reboot or shutdown the system. I can open konsole and type:
$ systemctl poweroff
$ systemctl reboot
and I’m not asked for it. But when I go to kickoff and select either one I do get asked for it (kdm is configured to use the commands above). Is there a file anywhere else I should modify?
You are not making it easier to get an answer for your system when you do not explain which version of openSUSE you use and which desktop.
But in my system (it is openSUSE 12.2 and KDE), there is System Settings > Systemadministration > Login Screen > tab Shutdown. There I see interesting items.
I have the opposite problem. It is not asking me any password to shutdown when I press “shutdown” on the login interface. Anybody accessing the login could shutdown my system. SLES 11.4