Witcher 3 black screen

After after restarting W3 up with widget marked HDR, I am getting black screen game works in the background I see only menu pointer?

i have exactly the same problem with Project
Cars 1

Often this is the result of the game using MSAA on the SwapChain (that’s not supported in HDR). When it’s not MSAA causing the problem, it may be that you need to turn on 8-bit render pass remastering.