Solved - Stuck on 800x600 on 1080Ti IOMMU Win10VM

Software & Operating Systems Linux
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Hey Guys,

I’m trying to get my VM working but I hit a snag. I’m able to get my video output via the 1080Ti but its stuck on a resolution of 800 x 600 and as the video card it says windows standard video output. I just thought that it was a driver issue but was able to install the drivers without any problems. But the problem persisted. Then I made my windows partition into a virtual partition and used that to boot the VM with, knowing for sure the drivers worked. But I’m still having the same issue. Any guesses to why?

System specs: Fedora 27, virtmanager as the virtualizer. Ryzen 1800X AMD R460 as primary gpu and a 1080Ti as secondary.

2

Are you by chance running a monitor directly connected to the GPU or running remotely/headless?

3

I’m running a monitor on the 1080Ti which is capable of a resolution of 2560x1400

4

If you look in the nvidia control panel (not Geforce Expirence), are you missing any options there?

5

It’s not there, if I dual boot into windows its there, but in the converted image its not. But it lists the 1080Ti in the hardware list

6

When you look in Device Manager, does the 1080 Ti have a yellow ! triangle on it?

If it does, and you right click it and click properties, what is the status of the device?

7

Hmmm, it says

Windows has stopped this device because it has reported problems. (Code 43)

But I made sure to follow the instructions to not have this issue. It installed the drivers without any errors. What would be my next step?

8

This is the error Nvidia Drivers throw when they see they’re in a Hypervisor (Virtualized). You need to trick them into thinking they’re running on a normal machine.

I’m having the same issue with a GT 710.

See my thread for things I’ve tried (One of them may work for you, knowing my luck):

For you, it could be as simple as adding hv_vendor_id=null to your KVM configuration.

9

This was exactly what I did, apparently that didn’t work. I’m going to read the thread you just send and hope for the best I guess.

1 Like
10

I managed to get it working, I think I didnt do the

virsh define win10.xml

command correctly. I changed the settings as descriped here: Nvidia error 43 and ran the virsh define command again and it worked.

1 Like
11

I have a solution about boot GPU.
with this solution,you can remove your primary card.
and set bios output > pcie slot 1.
yeah gtx 1080ti shows bios and linux booting and vm booting and running normally

12

Why do you want to remove your primary GPU?

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Hi i am very new Linux User since 4 days. I had the same problem. By default, some Nvidia drivers will actually disable your graphics card if it appears to be running in a VM.

Look for Solution please here:


and
https://www.youtube.com/watch?v=dsDUtzMkxFk&t=61s at Video on 13:05

Hope I could help, love this forum.

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Thank you for reply.
3 reasons:
because many motherboards (i have a H110M) do not have 2 or more PCIE x16/x8/x4 slot.
when you have 2 PCIE x16 slots and want to launch 2 Gaming VMs(maybe 2 gtx1080), there is no slot for the weak primary card.
if I want to buy a Gaming PC,I will not buy a weak primary card additionally.