[vfio-users] NVIDIA driver crash based on Seabios in libvirt

[Eddie Yen]

Update:

Today I'm doing few tests on my 4820K+X79 platform.
The Host is already upgraded to Fedora 23, which QEMU was upgraded to
v2.4.1, and the kernel was 4.2.7-fc23
Then, same as previous, using GTX980 as guest VM card. And guest was
Windows 7.

Here is my results.

1. Q35 / x-vga=on / without graphic >>> Got monitor but Code 10
2. Q35 / non x-vga=on / with graphic >>> Blank monitor + Code 10
3. Q35 / x-vga=on / with graphic >>> Same as 2
4. i440fx / x-vga=on / with graphic >>> Both monitor and VNC got blank
5. i440fx / non x-vga=on / with graphic >>> BSOD 0x3B
6. i440fx / x-vga=on / without graphic >>> Works

But if using AMD V4800 as guest card then using method 5, it works.

So this may proved that Alex talked about before, it's impossible to make
graphic and pass-through GPU exist together.
Only AMD, and NVIDIA card that Quadro K2200 and higher can be as secondary
GPU (As I know, it's possible to make VNC (Spice) and monitor worked at the
same time on Windows 10, just different resolution).

I'll try to get K2200 if I got enough budget.

2015-12-22 10:04 GMT+08:00 Eddie Yen <missile0407 at gmail.com>:

> Hello, everyone.
>
> These days I'm testing about NVIDIA cards on Seabios based VM.
> And I found that if using libvirt to boot up VM, may cause BSOD if using
> kvm=off.
> But if using QEMU command to launch, I got no issues.
>
> I googled, and found that libvirt still had this issue.
> And sometimes I need to use Seabios because I had few NVIDIA cards that
> didn't support UEFI.
>
> Here is my QEMU command
>
> http://pastebin.com/TcPswnjH
>
> And here is my libvirt XML
>
> http://pastebin.com/vwScrVZs
>
> The libvirt is created by virt-manager and edited manually.
>
> Many thanks,
> Eddie.
>
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