It may be not related to that issue, as i haven't update chipset drivers... I have 3x 4k monitors and suddenly, i had only one active monitor. Apparently, there is an easy fix, if you have the latest graphics driver:
Open adrenaline, select graphics > advanced > reset shader cache (restart? i can't remember if i had to do it)
But things went back to normal... it is a corruption of shaders data into the VRAM that can cause the issue.
I hope it'll help, Good luck!