Version: 4.2.0-55.12 (using KDE 4.2.0)
Installed from: SuSE RPMs
After recent update to latest packages from opensuse 11.1 factory repository, randomly at sometimes display goes blank. If I press alt+tab, I can see task name section(I have cover flow effect for alt+tab) but nothing else is displayed. By pressing ALT+Shift+F12 to desktop effects were disabled and I could see desktop again and enable the effects by pressing ALT+Shift+F12 again. I have no idea if this bug is related to X, plasma or desktop effects.
Please look at this report
*** This bug has been marked as a duplicate of bug 185127 ***