Q:

Enabling Ctrl+Alt+Del for X

How to I re-enbale the feature where Ctrl+Alt+Del will immediately kill X? I've been running into a graphics bug and I realized that, that was disabled in Ubuntu 16.10 for some reason. How do I get that functionality back?

A:

Open a terminal and run:
sudo -H gedit /etc/default/keyboard 
*instead of gedit you can use any other text editor that you have installed as leafpad
In the opened document, search for XKBOPTIONS="" and edit it so it looks like this XKBOPTIONS="terminate:ctrl_alt_bksp"
Save the file and reboot.

