Version: 4.0.0 (using KDE 4.0.0) Installed from: Gentoo Packages Compiler: gcc 4.1.2 OS: Linux There is no super-user button/mode in "systemsettings -> advanced -> login manager" and (of course) no settings can be made as a normal user. Starting systemsettings with kdesu solves this, but I guess you just forgot the button (it was there in KDE 3 ;).
*** This bug has been marked as a duplicate of 153692 ***