Your X11 fails to start or what? If so... Setting BusID parameter in xorg.conf should help starting any non primary GPU. Whatever the host bios outputs via GTX980 shouldn't worry you much. <div class="gmail_quote">On Nov 17, 2015 4:57 AM, "Erik Adler" <<a href="mailto:erik.adler@gmail.com">erik.adler@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">*** WARNING: THE ATTACHED DOCUMENT(S) CONTAIN MACROS *** *** MACROS MAY CONTAIN MALICIOUS CODE *** *** Open only if you can verify and trust the sender *** *** Please contact <a href="mailto:infosec@redhat.com">infosec@redhat.com</a> if you have questions or concerns ** <div dir="ltr">So I am testing a Supermircro X10DRi board with a Strix GTX980 GPUs. The CPUs are dual Intel Xeon E5-2630v3. The CPU's do not have built in graphics but there is a video source on the mainboard. A ASPEED AST2400 BMC. It is the crappy AST2400 that I am using for the host video. When I leave this facility the owners of this machine plan on later dropping in a 2ed identical GTX980 GPU for passthough. Hopefully Alex's vfio-pci-override-vga.sh can deal with that. The host machine is using BIOS not UEFI to boot. The guest is using libvirt, EDK2, qemu2.5, virt-manager and Linux 4.1.6 on Debian testing. The single Windows10 guest and GPU works flawless. The problem The AST2400 video chip sucks. I would like to drop in a cheapo Nvidia GF210 to deal with the host graphics. This is not a EFI GPU but the host is using BIOS so I would think this is not an issue. I instruct BIOS to use external video. The GTX980 is being bound to vfio-pci at init-top or as early as possible. Unfortunately I am not able to get any video out. It is as if both GPU's want to be boot-vga. I was informed in IRC that you must use a GeForce GTX980 as the boot GPU. Is that true? </div> _______________________________________________ vfio-users mailing list <a href="mailto:vfio-users@redhat.com">vfio-users@redhat.com</a> <a href="https://www.redhat.com/mailman/listinfo/vfio-users" rel="noreferrer" target="_blank">https://www.redhat.com/mailman/listinfo/vfio-users</a> </blockquote></div>