Reinstalled, no longer see graphic cards (virt-manager)

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frenzybiscuit1 · Post by **frenzybiscuit1** » Sat Sep 20, 2025 12:13 pm

I reinstalled and no longer see graphic cards on virt-manager under the virtio display with 3d acceleration.

https://i.imgur.com/r80GOf4.png

And when I try to use auto, I get this error:

https://i.imgur.com/e2v0enV.png

Before I reinstalled, I could use my AMD iGPU and it worked correctly on this setting..

Any ideas on how to fix this?

Post by **NeddySeagoon** » Sat Sep 20, 2025 12:50 pm

frenzybiscuit1,

Welcome to Gentoo.
What did you reinstall?
The host? The VM? Both? Just a few packages somewhere?

We need a bit more precisision in your problem report.

frenzybiscuit1 · Post by **frenzybiscuit1** » Sat Sep 20, 2025 12:51 pm

Correct, I reinstalled the host. I still use KDE, but I guess I must be missing a flag or package compared to before.

Post by **NeddySeagoon** » Sat Sep 20, 2025 12:57 pm

frenzybiscuit1,

Were you intending to use GPU passthrough but failed to set it up after the reinstall?
How did you reinstall the host without reinstalling the VM?

frenzybiscuit1 · Post by **frenzybiscuit1** » Sat Sep 20, 2025 7:52 pm

NeddySeagoon wrote:frenzybiscuit1,

Were you intending to use GPU passthrough but failed to set it up after the reinstall?
How did you reinstall the host without reinstalling the VM?

I reinstalled everything, but the hardware is the same.

I am not trying to use GPU passthrough, I'm trying to use VirtoIO with GPU acceleration. It usually lets me select the GPU to use. But after I reinstalled, it only lists auto as per the screenshots above.

frenzybiscuit1 · Post by **frenzybiscuit1** » Mon Sep 22, 2025 11:45 pm

I did a full reinstall and... it works.

https://i.imgur.com/E87btXs.png

I'd love if someone could tell me what use flag it is, since I have no idea...