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I'm following an excellent tutorial on passing GPU to a virtual machine. My system's output of lspci -nnk differs from the OP's - my kernel has only nouveau module but OP has both nouveau and nvidia installed.

I wonder, what impact does this fact have on host and guest machines?

Output of my lspci

01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM206 [GeForce GTX 950] [10de:1402] (rev a1)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:3208]
Kernel driver in use: vfio-pci
Kernel modules: nouveau

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It does not matter, because you are not going to use them on the host anyways. Since you are passing the device into a VM, the host must not use it and your lspci output tells me that you correctly load the stub driver (vfio-pci) instead of nvidia/nouveau. One of the stub drivers main jobs is to prevent either driver from claiming the device and trying to install nvidia now might actually mess up your stub driver loading.

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  • Great - I thought it was so.
    – sitilge
    Commented Feb 4, 2017 at 14:21

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