[vfio-users] physx can not work after VGA passthrough.

Alex Williamson alex.l.williamson at gmail.com
Mon Apr 4 16:38:14 UTC 2016

On Mon, Apr 4, 2016 at 9:13 AM, 温学敏 <Kayv at qq.com> wrote:

> Hi guys:
>     I was passthrough my GTX 970 on a win7_x64 and it works fine.The host
> is running a Fedora 23 Workstation.
>     I use virt-manager 1.3.2 to create the VM,The version of Libvirt is
> 1.2.18,QEMU version is 2.4.1.
>     But when I run the 3Dmark 11 to confirm the function and performance,I
> found that the physx function didn't work.
>     Aslo i found that the display tab  in the "dxdiag" command shows me
> the video memory is just 679MB,and the GTX 970 have 4096MB.
>     Can anyone tell me where is wrong?
>      here is my qemu startup log:

Your log doesn't show any indication of having the GPU assigned to the VM
at all.  Nor does it show any of the options necessary to make the NVIDIA
driver work in a VM and you're not even running OVMF for the VM BIOS.  Have
you followed any of the guides for configuring a VM for NVIDIA GeForce
assignment?  Start here:


Read parts 1-4 for the preferred way to make this work, part 5 only if
required.  Thanks,

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