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How exactly does "intel_iommu=igfx_off" affect the passthrough of an Intel IGD? Does it prevent the detachment of Intel IGD from host altogether so that the emulator such as qemu-kvm won't even see the assigned GPU in the first place as one of the available graphic device, let alone guest which is yet to boot? Or does it just affect graphics hardware acceleration to be unavailable within guest?

Thanks.

geekie12
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