[fritsch]

you can stop kodi - xrandr will kill the output anyways. Kodi on X11 currently cannot work without a display. Kodi's GBM version is able to do that since 2 days or something.

 Hello @fritsch , it'll be my age, it ll be the language (I remember always using a translator) but I can hardly follow you

- you can stop kodi - xrandr will kill the output anyways. -> You intend to stop it with the stop button or with this command ' sudo service kodi stop' ?
- Kodi's GBM version is able to do that since 2 days or something. -> What do you mean, GBM?  

 a) Kodi as you use it, is not able to run without a display as of now.
b) A special version of kodi using the GBM window system can switch to offline rendering - but this is currently not installable via the ppa or something I could guide you to use.