KVM Passthrough issues

[broken furnace]

So, I have both an AMD and NVIDIA GPU, the AMD card works fine on Linux, but I’d like to use the NVIDIA card for a Windows KVM. When I attempt to select the card whilst in the settings of the KVM. This doesn’t only apply to GPU’s either, but it is slightly different. I am able to select my Capture Card for passthrough, but it is simply not detected, not allowing it to function. I have no clue why the NVIDIA card isn’t detected (even by Linux) or why the capture card isn’t being registered after it’s passthrough.

[reef belfry]

Are you trying to do a QEMU KVM GPU passtrough?

[broken furnace]

Yes

[reef belfry]

Did you make all needed preparations for that? I.e. activating IOMMU, blacklisting your second GPU (or isolating, whatever it called), adding modules in mkinitcpio etc.?

If not, you can just simply refer to this video:
https://youtu.be/KVDUs019IB8
And also a documentation from official wiki:
https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF

[broken furnace]

I think so?

But probably not

[reef belfry]

Just get through the video and confirm, easy