monitor-hotplug.sh

#!/bin/sh
#
# Monitor hotplug for my Thinkpad X240 / Arch Linux / AwesomeWM setup.
#
# Create /etc/udev/rules.d/99-monitor-hotplug.rules with following content:
#
# ACTION=="change", SUBSYSTEM=="drm", ENV{HOTPLUG}=="1", RUN+="/home/me/bin/monitor-hotplug"

touch /tmp/monitor-hotplug.log
chmod a+w /tmp/monitor-hotplug.log
echo monitor-hotplug: `date` >> /tmp/monitor-hotplug.log

exec >> /tmp/monitor-hotplug.log 2>&1
set -x

if [ -z "$DISPLAY" ]; then
    export DISPLAY=:0
    export XAUTHORITY="$(dirname $(dirname $0))/.Xauthority"
    sleep 3
fi

OTHER=`xrandr | awk '/ connected /{print$1}' | grep -v eDP1`

if [ -z "$OTHER" ]; then
    ARGS=""
    for DP in `xrandr | awk '/connected/{print$1}' | grep -v eDP1`; do
        ARGS="$ARGS --output $DP --off"
    done
    xrandr --output eDP1 --auto $ARGS
else
    xrandr --output eDP1 --auto --output $OTHER --auto --right-of eDP1
fi