own

in full uefi mode and if it's the gpu you boot unraid with, "video=efifb:off" is to make unraid let the GOP (Graphics Output Protocol) in a clean state so your vm can interact with it if you set your motherboard bios in full uefi (csm off), boot unraid in uefi, bind the gpu to vfio, you just need to make your vm ovmf/q35/no additional vbios and it will work ootb and if you do that the amd reset problem is non existant doing that, "video=efifb:off" is only needed if it's your first gpu because even if you bind the gpu to vfio, idk why but unraid interact with the GPO and it's no more in a clean state also, if you have a problematic HBA, flash it from the efi shell of your motherboard, if your HBA doesn't have that possibility it probably mean it's a very old HBA, only very old hardware doesn't support uefi, for ex. every gpu that have at min a hdmi output and/or displayport output is uefi compatible