Sleep/Resume Scripts - GPU settings

I'm trying to set my GPU to limited mode but the setting is lost on sleep/resume. I can manually run the following command it works.

xrandr --output HDMI3 --set "Broadcast RGB" "Limited 16:235"

I then added a script to /storage/.config/sleep.d called 02-gpu.power (I already have another called 01-restart.power which restarts kodi on resume as I've a problem with the dvblink plugin at the moment). The 01- script runs fine each time but the 02- script doesn't seem to be called. If I run 'sh pathtoscript post' it works.

Can anyone point out what I'm missing?

01-restart.power
#!/bin/sh
case "$1" in
pre)
systemctl stop kodi
;;
post)
sleep 1
systemctl start kodi
;;
esac

02-gpu.power
#!/bin/sh
case "$1" in
post)
xrandr --output HDMI3 --set "Broadcast RGB" "Limited 16:235"
;;
esac

Anyone?

Is it normal that I'm having to set the xrandr again after resuming from sleep?

So I managed to set the xrorg values in an autostart.sh script so thats fine on boot up, but the settings don't persist when resuming from sleep.