[vfio-users] NVIDIA GPU Passthrough to Win10 - Driver Disabled (Code 43)

[Steven Bell]

So I tried a BIOS VM, freshly created from scratch. Reinstalled Windows 10
and was able to get the NIC and USB passthrough working fine. When I
removed the VNC Graphic device and Video Display, then add the NVIDIA card
(graphics and audio) the machine doesn't boot and needs to be forced off.
Even re-adding the VNC Graphic device and Video Display (so I can see what
is going on) fixes it allowing it to boot (even though the GPU devices are
still present). I can confirm when it boots normally that my TightVNC
connection works. But I'm blind when just the NVIDIA devices are present so
no clue WHY it's not booting.

On Mon, Jul 25, 2016 at 6:11 PM, Samuel Holland <samuel at sholland.org> wrote:

> On 07/25/2016 04:29 PM, Steven Bell wrote:
>
>> On Mon, Jul 25, 2016 at 5:23 PM, Philip Abernethy wrote:
>>
>>> Did you make sure that the card actually supports UEFI mode?
>>> Because my GTX 660 didn't. But the OS (Arch in my case) would
>>> happily boot with the UEFI set to UEFI-only mode and the card would
>>> silently run in legacy mode. I had to update the card's ROM. I used
>>> nvflash to check the card's UEFI capability and update the ROM.
>>>
>>
>> Interesting. I'll give the nvflash a try and post back my results.
>>
>
> Note that you do not need to actually flash a new ROM to the card to use
> it with qemu/KVM. You can just specify a path to the ROM file in your
> XML. This is much safer than flashing your card, especially if there is
> no UEFI-capable firmware available for your specific video card model.
>
> Samuel
>
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