I have FC-5 and use KDE.
As I said before my built in screen saver program doesn't work so I'm trying to use "xscreensaver". To set the times you run a program called "xscreensaver-demo". That brings up a dialog box that allows you to set parameters. It has a place that says "Blank After" This controls how long the computer is idle before the selected screen saver kicks in. Another place called "Cycle After" does just what it says. Another place called "Lock Screen After" lets you elect to lock the screen and the amount of time this locking function starts after the screen saver kicks in.
When I run "xscreensaver-demo" in a terminal a little screen comes up "WARNING" me that:
"The XScreenSaver daemon doesn't seem to be running on display ":0.0". Launch it now?"
and then below that you can hit "OK" or "Cancel". When I hit "Cancel" "Xscreensaver" doesn't work but when I hit "OK" it works fine.
I put the command "xscreensaver" (without the quotes) in the file "rc.local" so it would be run automatically every time I went into FC-5. Now I get the message:
"xscreensaver: warning: $DISPLAY daemon is not set defaulting to ":0.0"'
xscreensaver doesn't work in this configuration. I think I need to do more stuff but what? I think I need to start the xscreensaver daemon but how? I think I need to set the display but how? If someone can help me please do.