Building on a question from 2010 (3 years ago) I'm trying to achieve the exact opposite: I want to disable the Ctrl+Alt+ keyboard shortcut to kill the X server. For me, it appears to be disabled in System->Preferences->Keyboard but practically it's still up and running.

dontzap doesn't seem to be "active" (as in actively developed) either, and it seems counterintuitive to have to install it in order to disable this key-combo.

Any other ways to properly disable the shortcut?

PS: I think it's a bug.

PPS: Some time ago, I enabled it cuz I thought it was kinda cool - not knowing that it was a one-way street without a functioning / reliable option to disable it again.


Please edit the file /etc/X11/xorg.conf:

gksu gedit /etc/X11/xorg.conf

There should be a section in this file called "ServerFlags". If it's not there, add it as below at the end of the file. If it is there, make sure that the line Option "DontZap" "yes" is in there with yes as a parameter:

Section "ServerFlags"
Option "DontZap"  "yes"
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  • thx! followed your instructions (the file was empty previously). won't test it now, but on a fresh (re-)boot to see if it truly is disabled now... – nutty about natty Jul 9 '13 at 13:01
  • ah right. you can also look here: askubuntu.com/questions/4662/… – January Jul 9 '13 at 13:13
  • /etc/X11/xorg.conf was empty. Bad ? – nutty about natty Jul 9 '13 at 13:14
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    No, I only shows how old I am. yeah, X detects most of the settings automagically nowadays (and I sit on a 10.04 system which still has a proper xorg.conf). – January Jul 9 '13 at 13:15
  • So, did it work? – January Jul 9 '13 at 14:26
echo $'Section "ServerFlags"\n  Option "DontZap" "yes"\nEndSection' | sudo tee /usr/share/X11/xorg.conf.d/dontzap.conf
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  • Thanks - obviously the above answers are ancient as /etc/X11/xorg.conf hasn't been populated for ages now.... – David Goodwin Sep 4 '17 at 14:36
  • xorg.conf is empty, but I just tried this on Ubuntu 18.04 and it seems to work. – Mike Nakis Dec 12 '19 at 15:07

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