Linux Mint 18 Cinnamon - freezes when second monitor is attached

In my case, plugging in the Displays and turning them on before booting solved the issue. Seems like the UI is just not hot plug capable.

Good luck everybody!

I had the same issue with Linux Mint 18.3, I tried it with cinnamon, mate, and KDE, still, the issue persisted. I figured it was due to the compositor OpenGL, It seems that Linux mint works better with XRender more efficiently.