I am trying to use a second video as a VM pass through but even with video=vesafb:off,efifb:off in my grub command line and using
Section "ServerLayout" Option "SingleCard" "on" EndSection
Section "ServerFlags" Option "AutoAddDevices" "false" Option "AutoAddGPU" "false" Option "AutoBindGPU" "false" EndSection
it still uses both amd gpus. Then I can't link one to qemu because it is in use by X any help getting X to only use one video card would be nice.