Raspberry HDMI auto detect and update resolution

hdmi_hotplug.sh

#!/bin/bash
# sudo nano /etc/udev/rules.d/99-hdmi-hotplug.rules
# ACTION=="change", SUBSYSTEM=="drm", ENV{HOTPLUG}=="1", RUN+="/usr/local/bin/hdmi_hotplug.sh"
# sudo udevadm control --reload-rules

logger "Display changed."
export DISPLAY=:0
status=$(xrandr | grep 'HDMI-1' | awk '{print $2}')
logger "C: $status"

if [ "$status" == "connected" ]; then
        export DISPLAY=:0
        # Run xrandr to reconfigure the display
        xrandr --output HDMI-1 --auto  2>&1 | logger
fi