USING KDE
       Like GNOME, KDE also decided to invent their own screen saver framework from scratch instead of simply using xscreensaver.  To replace the KDE screen saver
       with xscreensaver, do the following:

           1: Turn off KDE‘s screen saver.
              Open the "Control Center" and select the "Appearance & Themes / Screensaver" page.  Un-check "Start Automatically".

           2: Find your Autostart directory.
              Open the "System Administration / Paths" page, and see what your "Autostart path" is set to: it will probably be ~/.kde/Autostart/ or something sim‐
              ilar.

           3: Make xscreensaver be an Autostart program.
              Create a .desktop file in your autostart directory called xscreensaver.desktop that contains the following five lines:

              [Desktop Entry]
              Exec=xscreensaver
              Name=XScreenSaver
              Type=Application
              X-KDE-StartupNotify=false

           4: Make the various "lock session" buttons call xscreensaver.
              The file you want to replace next has moved around over the years. It might be called /usr/libexec/kde4/kscreenlocker, or it might be called "kdesk‐
              top_lock"  or  "krunner_lock"  or  "kscreenlocker_greet",  and  it  might be in /usr/lib/kde4/libexec/ or in /usr/kde/3.5/bin/ or even in /usr/bin/,
              depending on the distro and phase of the moon.  Replace the contents of that file with these two lines:

              #!/bin/sh
              xscreensaver-command -lock

              Make sure the file is executable (chmod a+x).

       Now use xscreensaver normally, controlling it via the usual xscreensaver-demo(1) and xscreensaver-command(1) mechanisms.