Bug#916797: linux-image-4.19.0-1-amd64-unsigned: 4.19 + amdgpu + 144 hz = screen corruption / flickering

[Axel Regnat <axel.regnat@posteo.de>]

I'm going to close the bug. It only affects kernel 4.19. The newer 
Kernels like 4.20 or 5.0 are not affected and it seems that the fix 
won't be backported to 4.19.