Hi, I have an Asus Rampage IV Extreme mobo with two video cards. The top slot (GTX1070) is what the BIOS and Linux want to use, and the BIOS has no option to set the boot video device (/initial video output). The second slot has an AMD RX480. I want to boot into Linux and use only the RX480 with amdgpu. Currently I can only get Linux to boot and Xorg to start with amdgpu blacklisted. For convoluted reasons I need the GTX1070 in the top slot so I can't change this, I know this is the easy and obvious fix. I also want to use the GTX1080 for VFIO so blacklisting nvidia/nouveau is fine by me. Is this possible? If the BIOS doesn't have a way to specify which device to use then I seem to be forced to use the top slot as my video output device in GRUB but then I want Linux to be oblivious to it... *should* having amdgpu and such in my mkinitcpio work? With blacklists for nouveau etc. So far no luck but I am still trying. Thanks Edit: Magic words for Google are 'pass through boot GPU' -- plenty of results. Will work through those.