KDE Unlock problem
I have the same problem and it is very dangerous! I'm using KDE 4.4.5 on top of Ubuntu 10.04. Installed it from PPA repositories. Having problems unlocking locked session.
When using openGL screen savers, I can't even see unlock dialog box.
When using normal secreen savers like acquarium, I can see the unlock dialog box, but sometimes no matter how many times I try, I cannot unlock session it says "Unlocking failed". I have no choice than restarting my laptop and loosing all my work (Which makes me remember my bad days in windows!).
Pressing Ctrl+Alt+F2, logging in trough command line and running killall krunner_lock will not solve my problem. Becuase there is nothing named krunner_lock exist in my laptop!
qdbus org.kde.screenlocker /MainApplication quit DISPLAY=:0
qdbus org.kde.plasma-overlay /MainApplication quit DISPLAY=:0
will not solve the problem either. Because it says that it cannot connect to dbus server, even when run as root.
I can not let my computer go on and lock because then I'm not sure that I can unlock it after!