I have this issue too. I upgraded from gutsy to hardy alpha6 and I experienced it. Now with a fresh install of kubuntu hardy beta it's the same problem.
But when I get the blank screen, I can switch to tty1-6 I use compiz and nvidia-glx driver, and i'm up-to-date -- [hardy] logout ends in blank screen https://bugs.launchpad.net/bugs/181343 You received this bug notification because you are a member of Kubuntu Team, which is subscribed to kdebase in ubuntu. -- kubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
