A little script for starting X server on GPU used for passthrough by default

nvidia_switch.sh

#!/bin/bash

if [ x"$DISPLAY" != x ]; then
  SUDO="lxsudo"
else
  SUDO="sudo"
fi

if [ $UID = 0 ]; then

modprobe i2c-dev
# Switch monitor to HDMI input
ddccontrol -r 0x60 -w 17 dev:/dev/i2c-3
rmmod vfio-pci
modprobe nvidia_drm

CONFIG='
Section "ServerLayout"
  Identifier "game"
  Screen "gamescreen"
EndSection

Section "Monitor"
  Identifier "DFP-1"
EndSection

Section "Screen"
  Identifier "gamescreen"
  Device "Nvidia Card"
  GPUDevice "Nvidia Card"
  Monitor "DFP-1"
  Option "ConnectedMonitor" "DFP-1"
EndSection
'

echo "$CONFIG" > /etc/X11/xorg.conf.d/91-gamelayout.conf;

chmod 0666 /dev/tty8
#chvt 8
kill -10 $1
while kill -0 $1; do
sleep 1
done
#chvt 7
modprobe -r nvidia_drm
modprobe -r nvidia_modeset
modprobe -r nvidia
modprobe vfio-pci
# Switch monitor back to DVI input
ddccontrol -r 0x60 -w 3 dev:/dev/i2c-3
else
$SUDO sh $0 $$ &
prepare_input() {
  sleep 1s && sh $HOME/.Soft/switch_input.sh
}
startme(){
  prepare_input & startx /usr/bin/awesome -- :1 -layout game vt7 -sharevts
  sleep 1
  prepare_input
  exit
}
trap startme 10
wait %1
fi

switch_input.sh

#!/bin/bash

otherdisplay=":0"

if [ "$DISPLAY" = ":0" ]; then
  otherdisplay=":1"
else
  otherdisplay=":0"
fi


if (DISPLAY="$otherdisplay" xinput list &>/dev/null) && xinput list &> /dev/null; then
echo "Current display $DISPLAY, other display $otherdisplay"
for i in $(xinput list --id-only); do
  DISPLAY="$otherdisplay" xinput enable $i
  xinput disable $i
done
else
  echo "You are running only one display"
  for i in $(xinput list --id-only); do
    xinput enable $i
  done
fi