/etc/X11/xinit/xinitrc.d/10-monitors.sh

gistfile1.txt

#!/bin/sh

#TODO: fetch and calculate DPI from EDID data
internal=eDP1
internal_dpi=128
external=HDMI1
external_dpi=92

export SCALING_FACTOR=1

if xrandr | grep "$external disconnected"; then
    xrandr --output "$external" --off --output "$internal" --auto --dpi $internal_dpi
    dpi=$internal_dpi
    #export SCALING_FACTOR=$(bc <<< "scale = 2; $internal_dpi/$external_dpi")
    export SCALING_FACTOR=1.2
else
    xrandr --output "$internal" --auto --mode 1600x900 --output "$external" --auto --right-of eDP1 --dpi $external_dpi
    #xrandr --output "$internal" --auto --output "$external" --auto --same-as eDP1 --dpi $external_dpi
    dpi=$external_dpi
    export SCALING_FACTOR=1
fi

echo "Xft.dpi: $dpi" > /tmp/.xresourcesdpi
xrdb -override /tmp/.xresourcesdpi

if [ -d $HOME/.config/xinit ] ; then
 for f in $HOME/.config/xinit/?*.sh ; do
  [ -x "$f" ] && . "$f"
 done
 unset f
fi