Nvidia optimus laptop run Xorg on nvidia gpu by default

.xinitrc

systemctl --user import-environment DISPLAY
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto
exec i3
#exec startkde

20-intel.conf

# /etc/X11/xorg.conf.d/20-intel.conf

      Section "Device"
        Identifier "intel"
        Driver "modesetting"
        Option      "AccelMethod"  "none"
      EndSection
      Section "Screen"
        Identifier "intel"
        Device "intel"
      EndSection

20-nvidia.conf

# /etc/X11/xorg.conf.d/20-nvidia.conf

Section "Files"
  ModulePath "/usr/lib/nvidia"
  ModulePath "/usr/lib32/nvidia"
  ModulePath "/usr/lib32/nvidia/xorg/modules"
  ModulePath "/usr/lib32/xorg/modules"
  ModulePath "/usr/lib64/nvidia/xorg/modules"
  ModulePath "/usr/lib64/xorg/modules"
EndSection

Section "ServerLayout"
    Identifier "layout"
    Screen 1 "nvidia" 0 0
    Inactive "intel"
EndSection

Section "Device"
    Identifier "nvidia"
    Driver "nvidia"
    BusID "PCI:1:0:0"
EndSection

Section "Screen"
    Identifier "nvidia"
    Device "nvidia"
EndSection

enable_nvidia_gpu.sh

#!/bin/bash
# /usr/local/bin/enable_nvidia_gpu.sh
CONTROLLER_BUS_ID=0000:00:01.0
DEVICE_BUS_ID=0000:01:00.0
MODULES_LOAD=(nvidia nvidia_uvm nvidia_modeset "nvidia_drm modeset=1")

echo 'Turning the PCIe controller on to allow card rescan'
sudo tee /sys/bus/pci/devices/${CONTROLLER_BUS_ID}/power/control <<<on
echo 'Waiting 1 second'
sleep 1

if [[ ! -d /sys/bus/pci/devices/${DEVICE_BUS_ID} ]]; then
	echo 'Rescanning PCI devices'
	tee /sys/bus/pci/rescan <<<1
	echo "Waiting 1 second for rescan"
	sleep 1
fi

echo 'Turning the card on'
tee /sys/bus/pci/devices/${DEVICE_BUS_ID}/power/control <<<on

for module in "${MODULES_LOAD[@]}"
do
	echo "Loading module ${module}"
	modprobe ${module}
done

nvidia-pm.service

[Unit]
Description="Turn on Nvidia GPU and load Nvidia modules"

[Service]
Type=oneshot
User=root
ExecStart=/usr/local/bin/enable_nvidia_gpu.sh

[Install]
WantedBy=multi-user.target