Chromebook Acer r 13 – Impossible chnge display settings

Hi all and thenx in advace for your answers

I have an Aecer Chromebook i set the dev-channel in to have access to google paly and the related apps
l Versione 59.0.3071.35 dev
Piattaforma 9460.23.0 (Official Build) dev-channel elm
Versione ARC 3962446
Firmware Google_Elm.8438.73.0

I downloaded the official kodi application from google paly and for few days all was fine, now in the video settings i can’t change the Kodi screen resolution
https://drive.google.com/open?id=0B0cBnQ…192eS1hUDQ

Any idea to fix it?

Thanks again