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5.11. X Window System (Graphics)

This section contains information related to the X Window System implementation, X.Org, provided with Fedora.

5.11.1. X server

The key combination Ctrl+Alt+Backspace to kill the X server has been disabled by default as a decision of the upstream Xorg project. You can change the default by adding the following section to your xorg.conf file. If one does not exist, you can create it manually at /etc/X11/xorg.conf using a text editor and Xorg will honor that setting.
Section "ServerFlags"
Option "DontZap" "false"

If you use kickstart or want to use scripts to change this setting automatically across multiple systems, you can use the following snippet:

grep -q -s DontZap /etc/X11/xorg.conf
if [ $append -ne 0 ]; then
  cat >> /etc/X11/xorg.conf << EOF
  Section "ServerFlags"
  Option "DontZap" "false"


The Xorg project has changed the default DontZap setting to "true" after complaints from desktop users that accidentally hit Ctrl+Alt+Backspace when trying to type Alt+Backspace, Ctrl+Backspace, or Shift+Backspace, or who had StickyKeys enabled. Ctrl+Alt+Backspace is also a keyboard shortcut for deleting certain expressions in C and Java modes in Emacs.

5.11.2. Third-party Video Drivers

Refer to the Xorg third-party drivers page for detailed guidelines on using third-party video drivers: