kscreenlocker_greet without --testing isn't a good test, as it relies on services talking to it to work properly. Test package is built: https://build.opensuse.org/package/show/home:Vogtinator:boo1174448/kscreenlocker Please install and provide the output of /usr/lib64/libexec/kscreenlocker_greet --testing and whether it's working properly (you might need to log out and in again).