Many Thanks,
my iGPU is now accelerated, but the Desktop is pink ( and green ). This is the state of my preinstalled catalina 10.15.1.
By the way, am using the BIOS 1.11.0. Not relevant , or not so good?
Just now I'm about to install mojave but it seems, the color problem will be the same.
Maybe you know, what's going wrong.