Hi Paul Hays, Thank you so much. It works! Finally this problem solved. : ) Best regards, Qingwei ------------------------------------------------------------------------------------------ Apparently for KDE you *also* have to do this: "... go to Kickoff > Computer > System Settings which will open up the System Settings window. Click on 'Input Devices'. In this new window click the Keyboard tab and then click on the advanced tab. In this new window, click the box for 'Configure keyboard options.' Expand the entry for 'Key sequence to kill the X server' and ensure Ctrl+Alt+Backspace is checked. Click Apply and close the System Settings window." ref: https://wiki.archlinux.org/index.php/Xorg#Ctrl-Alt-Backspace_doesn.27t_exit_X (That is certainly user-friendly, yes?) On 14/03/2013 11:46 AM, Qingwei Zhang wrote: > Dear all, > > I have Fedora-18 64 bit KDE install and and I find that > ctrl+alt+backspace does not work. > > I have try to modify the /usr/share/X11/xorg.conf.d/10-evdev.conf, > adding following statement > > Option "XkbOptions" "terminate:ctrl_alt_bksp" , > > Then, in my case, at the 10-evdev.conf, there is: > > ... > Section "InputClass" > Identifier "system-setup-keyboard" > MatchIsKeyboard "on" > Option "XkbOptions" "terminate:ctrl_alt_bksp" > EndSection > ... > > > I remember on FC-17 I can log out/in that way, not on the FC-18 install. > > Any thought? > > -- Qingwei Zhang Do something today that your future self will thank you for.