Stop screen tearing on Ubuntu by changing compositor

Install Compton (https://github.com/chjj/compton/)

sudo apt-get install compton 

Disable existing compositor (I used Metacity with Gnome Flashback)

gsettings set org.gnome.metacity compositing-manager false

Add Compton to “Startup Applications”

compton --backend glx --paint-on-overlay --vsync opengl-swc