How to activate numlock on by default in Manjaro or any other Arch derivative
Problem:
You have Manjaro with Xfce desktop environment installed and you want to turn numlock on by default so that you can use the number-pad on your keyboard at the login screen and after logging-in to Xfce desktop. This should have been the default behavior but sadly it’s not! Anyway, it’s an easy problem to fix. This solution is written for Manjaro but it should work on almost all Arch Linux based distributions and derivatives with LightDM display manager.