[vfio-users] Video out issue on Supermircro X10DRi

[Erik Adler]

>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.

Thanks for your input.
Actually I don't get any video out. The only way for be to get back into
BIOS was to pull out one of the GPUs. I needed to do this to set the BIOS
back to internal graphics. Seems to be long before the OS kicks in.

That is why I was wondering if there is a known hardware limitation. On my
own system (Z10PE-D8) I have passed three GPUs but was using the internal
video for the host. When I am back in my home town Ill have to give this a
try.

On Tue, Nov 17, 2015 at 6:38 AM, Blank Field <ihatethisfield at gmail.com>
wrote:

> 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.
> On Nov 17, 2015 4:57 AM, "Erik Adler" <erik.adler at gmail.com> wrote:
>
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>>
>> 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?
>>
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