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Distribution: Distribution: RHEL 5 with Pieces of this and that.
Kernel 18.104.22.168, KDE 3.5.8 and KDE 4.0 beta, Plu
Seen this before in Fedora but never could figure out why it happened. To get around this I did the following and was using KDE as gui.
Disable screensaver from the KDE control panel
Now open a terminal window and run the command ' xscreensaver & '
Quickly click on the settings tab and setup as needed.
If I remember when you test one and come back the settings screen is gone. Open a second terminal window and use the command ' xscreensaver-demo ' and go back to modifing.
When done I add ' xscreensaver & ' to my /etc/rc.loca file. This may only apply to Redhat and Redhat clone distros. You may have to create a new service for it or add to an existing service that is running.
This bugged me for a long time also, but I recently figured out what was causing it. It's the monitor power-saving support in X. You can turn it off with the command "xset -dpms" (and on again with "xset +dpms"). See man xset for more options. To make it permanent, edit your xorg.conf file and remove the dpms entry from the monitor section.
Of course, I could be wrong and you might be experiencing some other problem instead.
From the xscreensaver manual, here's how to start xscreensaver at boot instead of the kde screensaver. It worked for me:
USING KDE (K DESKTOP ENVIRONMENT)
I understand that KDE has invented their own wrapper around xscreensaver, that is inferior to xscreensaver-demo (1) in any number of ways. I've never actually seen it, but I'm told that this is the way you disable it:
1: Switch off KDE's screen saver.
Open the ``Control Center'' and select the ``Look and Feel / Screensaver'' page. Turn off the ``Enable Screensaver'' checkbox.
2: Find your Autostart directory.
Open the ``Look and Feel / Desktop / Paths'' page, and see what your ``Autostart'' directory is set to: it will probably be ~/.kde3/Autostart/ or something similar.
3: Make xscreensaver be an Autostart program.
Create a file in your autostart directory called xscreensaver.desktop that contains the following five lines: