start.sh
#!/bin/bash
# Helpful to read output when debugging
set -x

# Load the config file with our environmental variables
source "/etc/libvirt/hooks/kvm.conf"

# Stop your display manager. If you're on kde it'll be sddm.service. Gnome users should use 'killall gdm-x-session' instead
systemctl stop sddm.service

# Unbind VTconsoles
echo 0 > /sys/class/vtconsole/vtcon0/bind
# Some machines might have more than 1 virtual console. Add a line for each corresponding VTConsole
echo 0 > /sys/class/vtconsole/vtcon1/bind

# Unbind EFI-Framebuffer
echo vesa-framebuffer.0 > /sys/bus/platform/drivers/vesa-framebuffer/unbind

# Avoid a race condition by waiting a couple of seconds. This can be calibrated to be shorter or longer if required for your system
sleep 5

# Unload all Nvidia drivers
modprobe -r nvidia_drm
modprobe -r nvidia_modeset
modprobe -r nvidia_uvm
modprobe -r nvidia

# Unbind the GPU from display driver
virsh nodedev-detach pci_0000_2d_00_0
virsh nodedev-detach pci_0000_2d_00_1

# Load VFIO kernel module
modprobe vfio
modprobe vfio_pci
modprobe vfio_iommu_type1

stop.sh
#!/bin/bash
set -x

# Unload VFIO-PCI Kernel Driver
modprobe -r vfio_pci
modprobe -r vfio_iommu_type1
modprobe -r vfio

# Re-Bind GPU to our display drivers
virsh nodedev-reattach pci_0000_2d_00_0
virsh nodedev-reattach pci_0000_2d_00_1

# Rebind VT consoles
echo 1 > /sys/class/vtconsole/vtcon0/bind
echo 1 > /sys/class/vtconsole/vtcon1/bind

# Read our nvidia configuration when before starting our graphics
nvidia-xconfig --query-gpu-info > /dev/null 2>&1

# Re-Bind EFI-Framebuffer
echo "vesa-framebuffer.0" > /sys/bus/platform/drivers/vesa-framebuffer/bind

# Load nvidia drivers
modprobe nvidia_drm
modprobe nvidia_modeset
modprobe nvidia_uvm
modprobe nvidia

# Restart Display Manager
systemctl start sddm.service