when I enabled 3D accelaration, which I am doing to attempt to run dual monitors on my Win10 guest, I get this weird small black box on the screen.
Host: Manjaro x86_64 4.19.108-1
CPU: AMD Ryzen 7 1700
Graphics: NVIDIA GeForce GTX 1060 3GB
So on the Vbox guest settings I have Video Memory maxed at 256 MB, Monitor Count 2, Scale Factor All Monitors, Graphics Controller VBoxSVGA, and Enable 3D Acceleration. I also have Vbox GuestAdditions installed as an iso.
With 3D Acceleration enabled, this black box shows up on the screen and there is flicker...without it, no black box and no flicker.