By default, xfce screensaver requires xscreensaver. You have the _option_ to remove xscreensaver using the following command (as privileged): apt-get remove xscreensaver To install the gnome-screensaver use the following command (as privileged): apt-get install gnome-screensaver To auto-start the gnome-screensaver, add it as an Autostarted Application: Xfce menu > Settings > Autostarted Applications The command for starting the gnome-screensaver daemon is: gnome-screensaver To be able to use the action button "Lock screen" to start gnome-screensaver immediately and lock your screen, modify the file /usr/bin/xflock4: #xscreensaver-command -lock || xlock $* gnome-screensaver-command --lock exit 0 Note that the original xscreensaver command is now commented. Backup the original copy of xflock4 (as privileged): cp /usr/bin/xflock4 /usr/bin/xflock4.orig Hope that helps. If you have questions, post them at: http://www.linuxquestions.org/questions/showthread.php?t=458516 and l...