[CRASH] Black screen after champion select

I have been having this problem ever since I have installed lol a few days ago. I am using 2 monitors and every time I start lol on my second monitor I get a black screen and crash. What I do to solve it (for now) it unplugging my monitor on chemp select and repluging it after the loading screen is showing' but if I forget to unplug it I must wait until the actual match starts reconnect' wait until the loading screen shows and the reconnect my monitor. and ever since I have update the game client I cant get a crash reaport, but before the update I sent about 10 crash reaports so I am sure that riot can find then very easily I lunch the game I enter the queue Select my champion Wait for the timer to end Anddd BOOM black screen.

I would love to get some help ASAP tnx :D!