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Can't passthrough GPU to VM - Execution error

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Hello everyone!

I've recently saw a video about the upcoming features on version 7 and I'm doing some testing with the beta. I'm testing passing through a GPU to my Windows 11 VM and I'm getting the following error:

 

Execution error

internal error: QEMU unexpectedly closed the monitor (vm='VM-WIT'): 2024-10-29T22:44:30.060155Z qemu-system-x86_64: -device {"driver":"vfio-pci","host":"0000:01:00.0","id":"hostdev0","bus":"pci.7","multifunction":true,"addr":"0x0"}: vfio 0000:01:00.0: group 2 is not viable Please ensure all devices within the iommu_group are bound to their vfio bus driver.


Screenshot2024-10-29233841.png.99d705f2d94413a10c1442ec9d469d59.png

 

This are my GPU settings on my VM

image.thumb.png.df83668effa205b6a11d05a1df3a1b70.png

 

And this is what I have in Sytem Devices section:

Screenshot2024-10-29233942.thumb.png.c69ca1f830c087350e22bbaf4852f364.png

 


My motherboard is old (Asrock Z87 Extreme4) but it has Intel Virtualization Technology and VT-d and they are both enabled. What am I missing?

Edited by s1l3nce

13 minutes ago, s1l3nce said:

Hello everyone!

I've recently saw a video about the upcoming features on version 7 and I'm doing some testing with the beta. I'm testing passing through a GPU to my Windows 11 VM and I'm getting the following error:

 

Execution error

internal error: QEMU unexpectedly closed the monitor (vm='VM-WIT'): 2024-10-29T22:44:30.060155Z qemu-system-x86_64: -device {"driver":"vfio-pci","host":"0000:01:00.0","id":"hostdev0","bus":"pci.7","multifunction":true,"addr":"0x0"}: vfio 0000:01:00.0: group 2 is not viable Please ensure all devices within the iommu_group are bound to their vfio bus driver.


Screenshot2024-10-29233841.png.99d705f2d94413a10c1442ec9d469d59.png

 

This are my GPU settings on my VM

image.thumb.png.df83668effa205b6a11d05a1df3a1b70.png

 

And this is what I have in Sytem Devices section:

Screenshot2024-10-29233942.thumb.png.c69ca1f830c087350e22bbaf4852f364.png

 


My motherboard is old (Asrock Z87 Extreme4) but it has Intel Virtualization Technology and VT-d and they are both enabled. What am I missing?

They are in the same iommu group as other devices including your hba. All of the devices you want to pass thru have to be in there own iommu group. If both parts of the GPU and in the same group that is ok as you will be passing both parts.

  • Author

ChatGPT just gave me the answer to my issue: set PCIe ACS Override to either Both or Downstream (under VM Manager, advanced settings) (I selected downstream). That fixed it 👌

Edited by s1l3nce

  • Author

Well, not so fast. I managed to get rid of the error I described above but now I just can't make it work. As soon as I start installing drivers for the GPU, the VM freezes. I've tried with an AMD R9 270 too but it didn't work either.

Edited by s1l3nce

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