Comment 7 for bug 1040649

Hi again ;)
I tried to write a plugin yesterday..what should I say..I failed ;) (thx for the good youtube video anyway)

So I came along with another solution (for now):

udev rules!
I have two simple udev rules, that monitors if a hdmi monitor is connected or disconnected and execute a script.

First find your env variables to identify the device:
georg@ideapad:~$ udevadm monitor --environment --udev

I got something like "ID_MODEL == "TS2GJF110"" which is unique on my system.

so here are our rules(/etc/udev/rules.d/70-hdmi.rules):
ACTION=="add", ENV{ID_MODEL}=="TS2GJF110", RUN+="/usr/local/bin/hdmi.sh"
ACTION=="remove", ENV{ID_MODEL}=="TS2GJF110", RUN+="/usr/local/bin/hdmi.sh"

Another good thing (for me) is that we can identify the device..so the rule only applies to my hdmi monitor, not the beamer at work ;-)

my simple script:
#!/bin/sh

status="$(cat /sys/class/drm/card0-HDMI-A-1/status)"

export XAUTHORITY=/home/georg/.Xauthority
export DISPLAY=:0.0

if [ "${status}" = disconnected ]
then
 xrandr --output LVDS1 --auto --output HDMI-0 --off

elif [ "${status}" = connected ]
then
 xrandr --output LVDS1 --off --output HDMI-0 --mode 1920x1080
fi

hope it helps someone until cuttlefish get a plugin for that action...since you can customize it a way better.