Ubuntu – how to disable Ctrl+Q system wide

Disclaimer: This is not exactly what you want, but I've spent too much time on this not to post it and maybe someone else can use it.

I got as far as Ctrl + F11 is fullscreen everywhere but Chromium where it is Chromium's fullscreen !

1. Train of thought

I thought I might be able to trick the window manager if I use xdotool and send the command directly to the chrome window - to no avail.

Then I thought I might be able to change the keyboard shortcut in google chrome, but that seems hardcoded - another dead end.

2. Which leaves us with this

Install xdotool to simulate keyboard presses

sudo apt-get install xdotool

reconfigure the Ubuntu Keyboard shortcuts to something arbitrary, that we never type but is usable in the script

Settings -> Devices -> Keyboard

Scroll down and edit Toggle fullscreen mode to Ctrl + Alt + 1 and then hit the + and add a custom keyboard shortcut

and then hit the + and add a custom keyboard shortcut

edit the script

nano /home/user/fullscreen.sh


#!/bin/bash
export DISPLAY=:0
windowname=$(xdotool getactivewindow getwindowname | cut -d "-" -f 2)
if [[ $windowname != *"Chromium"* ]]
then
xdotool keydown Ctrl keydown Alt key 1 keyup Alt keyup Ctrl
else
xdotool search --onlyvisible --class "Chromium" windowfocus 
sleep 0.2
xdotool key F11
fi

make it executeable

chmod +x /home/user/fullscreen.sh

3. Conclusion

It seems impossible to trick the windowmanager and smuggle keystroke by, but there are certainly workarounds possible. In this case Google made the fullscreen keyboard shortcut non-configureable, so it falls just short of the mark

Now with Ctrl + F11 the windowmanager controls the fullscreen behavior except in chromium.

This worked for me: https://stackoverflow.com/questions/24908490/ubuntu-do-not-lock-the-screen-when-pressing-superl

Basically: Unity also has a shortcut that overrides the one in the keyboard configuration, and you can edit it using CompizConfig (you can install it via Ubuntu Software, search for CompizConfig Settings Manager). Remapping wasn't working in all cases for me, but completely disabling the shortcut (uncheck "Enabled") did the trick. Ctrl+Alt+L now works well in IntelliJ Idea.