Attempting single GPU passthrough but only getting a black screen

Trooper_ish · January 31, 2021, 10:57am

For testing, you could try killing gnome+gdm and stuff, logging in with ssh, then with sudo, try a couple of the echo commands, but using your devices addresses?

Need help with dynamically binding and un-binding Nvidia GPU VFIO

Hey Tree, that would be my guide you’re talking about Like gordonthree said, you could run a script like this: #!/bin/bash # VGA Controller: unbind nvidia and bind vfio-pci echo '0000:0f:00.0' > /sys/bus/pci/devices/0000:0f:00.0/driver/unbind echo '10de 100a' > /sys/bus/pci/drivers/vfio-pci/new_id echo '0000:0f:00.0' > /sys/bus/pci/devices/0000:0f:00.0/driver/bind echo '10de 100a' > /sys/bus/pci/drivers/vfio-pci/remove_id # Audio Controller: unbind snd_hda_intel and bind vfio-pci echo '0000:0f:00.1' > /sys/bus/pci/devices/0000:0f:00.1/driver/unbind echo '10de 0e1a' > /sys/bus/pci/drivers/vfio-pci/new_id echo '0000:0f:00.1' > /sys/bus/pci/devices/0000:0f:00.1/driver/bind echo '10de 0e1a' > /sys/bus/pci/drivers/vfio-pci/remove_id I’m using the virsh tool in my scripts but this works and is a manual way of accomplishing the same task. Also, it doesn’t matter if you’re using GPUs with the same drivers or not. The only thing to be careful about is this: ## Unload nvidia modprobe -r nvidia_drm modprobe -r nvidia_uvm modprobe -r nvidia_modeset ^^ Since you’ll be using two Nvidia GPUs, you wont be able to unload these modules because they’ll have non-zero usage count (this wasn’t an issue for me because I had an AMD GPU for my host). So go ahead and just delete those lines for your setup.