Turn NVIDIA discrete card off on Linux

nvidia_off.sh

#!/bin/bash
set -ex

CONTROLLER_BUS_ID=0000:00:01.0
DEVICE_BUS_ID=0000:01:00.0

if sudo lsof /dev/nvidia0 ; then
  echo 'Some processes are still using the card, aborting.'
  exit 1
fi

sudo modprobe -r nvidia_drm nvidia_modeset nvidia_uvm nvidia
sudo tee /sys/bus/pci/devices/${DEVICE_BUS_ID}/remove <<<1
sudo tee /sys/bus/pci/devices/${CONTROLLER_BUS_ID}/power/control <<<auto