19.10 Ubuntu host entirely freezes during Windows 10 qemu install
You will almost certainly need to blacklist nouveau and nvidia device drivers, and set up a startup script that does the above binding to vfio-pci, and then explicitly loads nouveau/nvidia kernel drivers to let them bind do the hardware devices you didn't already explicitly bind to vfio-pci in your script prior to that point. Once the host side driver has tainted the device, the device tends not to work for pci passthrough any more on most setups.