I am distro-hopping from Arch to Mint. It's cause of my laptop ThinkPad T420S has Displayport to output the Monitor, and it seems to manage by nvidia GF119. Using Arch to solve the monitor switch problem is not easy to fix. I try many, not only TP's fail but also nvidia's driver is too difficult to install correct.
So, I decide to use Mint or lubuntu to make this problem not to happen.
It is a bad solution to install nvidia-optimus, but it can be free from this FK problem immediatly.
Now it is work on my TP correctly, maybe. I don't want to check this problem in these days.