Re: GPU Passthrough issue

[Brian McKee]

Thanks for the quick reply Nick.

I followed that guide and edited my Windows10.xml in libvirt. I've attached it.

The behavior is the same. Nvidia's latest driver: 516.59, does not
work find the card.

There is a difference between the image of the device mangler in the
website you gave me and what I'm seeing in Windows 10. In the example,
it properly identifies the card as a GTX. In my Windows 10, it calls
it a "Microsoft Basic Display Adapter."

I'm not sure what is wrong, but I really want it to work, so my
motivation is high. Tell me what to do and I'll try it. Need
information, just tell me what you need.

Thanks again.

Brian

On Sun, Jul 17, 2022 at 12:58 PM Nick S <nick.kvmhv@gmail.com> wrote:
>
> Check if you have this condition:
> https://mathiashueber.com/fighting-error-43-nvidia-gpu-virtual-machine/#:~:text=The%20infamous%20error%2043%20is,800%20by%20600%20display%20resolution.
> Nvidia removed those checks in the recent versions of their drivers, but I am 
> not sure what version you used.
>
> On Sun, Jul 17, 2022 at 10:43 AM Brian McKee <raydude@gmail.com> wrote:
>>
>> I've been using Virtmanager, KVM/QEMU for my work laptop for years. I
>> ditched VirtualBox because I was tired of my VM being broken once or
>> twice a year with an update.
>>
>> QEMU has been awesome!  I run Spice QXL on it and it's a little
>> slower, but it does well enough for Orcad for me to be productive.
>>
>> I found out about GPU passthrough a couple years ago. I decided to try
>> it on my new laptop, which I just got on Monday.
>>
>> Following Arch and Gentoo's guides (I run Gentoo) I have it working,
>> except for one thing: Windows does not recognize the GPU as an NVIDIA
>> RTX 3060M. The PCI IDs are correct, but for some reason Windows
>> doesn't get it.
>>
>> I read in Arch's guide that old versions of Nvidia's installer did not
>> recognize the PCIe device, but I didn't think that applied now. Plus,
>> I suspect if it were working properly that Windows would detect it as
>> an RTX3060M.
>>
>> I have both the VGA and audio device routed with vfio: (they are on an
>> unique IOMMU group: 14)
>>
>> lenny ~ # lspci -nnk -d 10de:2560
>> 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA106M
>> [GeForce RTX 3060 Mobile / Max-Q] [10de
>> :2560] (rev a1)
>>        Subsystem: Lenovo GA106M [GeForce RTX 3060 Mobile / Max-Q] [17aa:3b07]
>>        Kernel driver in use: vfio-pci
>> lenny ~ # lspci -nnk -d 10de:228e
>> 01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:228e] (rev a1)
>>        Kernel driver in use: vfio-pci
>>        Kernel modules: snd_hda_intel
>>
>> I have added them both in virt-manager:
>>
>> <hostdev mode="subsystem" type="pci" managed="yes">
>>   <source>
>>     <address domain="0x0000" bus="0x01" slot="0x00" function="0x0"/>
>>   </source>
>>   <address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
>> </hostdev>
>> <hostdev mode="subsystem" type="pci" managed="yes">
>>   <source>
>>     <address domain="0x0000" bus="0x01" slot="0x00" function="0x1"/>
>>   </source>
>>   <rom bar="off"/>
>>   <address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
>> </hostdev>
>>
>> After I got them passed properly and enabled EFI in the virtual BIOS,
>> the card initialized with the BIOS message. Then I deleted the virtual
>> screen and when Windows ran it displayed on the RTX3060M output!
>>
>> But, the Windows Driver chosen for the hardware is: "Microsoft Basic
>> Display Adapter" and it's stuck in 800X600 resolution.
>>
>> The NVIDIA driver says the hardware is not compatible with the driver.
>> It cannot find a compatible GPU.
>>
>> I'm a little stuck, I was hoping you guys could help me out. I'd
>> really love to game on my gentoo box in KVM / QEMU.
>>
>> Thanks in advance.
>>
>> Brian
>>
>> --
>> -- Consciousness moves everything.
>>


-- 
-- Consciousness moves everything.

Windows10.xml
Description: XML document