Running SuSE 11.1 w/ KDE 4. Screensaver keeps blanking out my screen on me and I can't find a setting to turn it off. A secondary issue is that it also eventually locks my screen on me if screen is blanked for awhile. Would like to make it stop doing that too! Hard to use it as a monitoring/display session if it keeps blanking out my screen!
Open Configure Desktop/Personal Settings.
Go to Advanced > Power Management > Edit Profiles, and in the setting for the profile you are using (or all profiles) change the option for When the system is idle for more than XX min to Do nothing.
In a default install it is set to Lock screen, and this overrides ANY timeout and password lock settings you have set for a screensaver in General > Desktop > Screensaver (particularly if you have unchecked Start automatically, or set the timeout to a period longer than the timeout in the Power Management settings).
This answer was copied from user Clayton on the opensuse forum post titled Screen blanking/locking and 11.1.
The Easiest Method for My device was to open the system menu. Under System, which is on the right hand side you click "control Center". Click "Screensaver" under look and feel; Alternatively, you can type "Screensaver" in the search box. On the bottom of the screen saver preferences window there is check boxes un-check "Activate Screen Saver When Computer is Idle" and "Lock screen when screensaver is active". When you are done click "Close".