How to enable/disable Ctrl+Alt+Backspace in Ubuntu 9.10 (Karmic)

Ctrl+Alt+Backspace (the shortcut which was used to restart the X server) has to be enabled in a different way starting in Ubuntu 9.10 (Karmic Koala).

Using GNOME

  • Get to the System->Preferences->Keyboard menu.
  • Select the “Layouts” tab and click on the “Layout Options” button.
  • Then select “Key sequence to kill the X server” and enable “Control + Alt + Backspace”.

Click the link below for the full article and how to do it in KDE.

Source: Ubuntu Geek.