[sabelstrom]

BTW the hdmi-cable from the Chromebox goes the the HT and a hdmi-cable goes from the HT to the TV, and i hade no sync problem in 16.1 so i think all hardware and cables works fine.

 
your screenshot is calling you a liar, as the audio EDID reflects being connected to the TV, not the AVR/HT

I would try downloading fresh install media and booting in live mode, to ensure all defaults are used, and see if that works once you've verified the HDMI connections. If you still have the problem there, then I'd move your question to the general Linux forum (or LE forums) as A/V sync is a more general Kodi issue specific to your setup, not one specific to the Chromebox (and not one I have any experience with given mine works without sync issues)  

Hi Matt.

The sync seems to work after a shutdown of the chromebox, didnt think of that :-(

I have a backup of my 16.1, is it the profile file that have all settings? Maybe i should compare them.

Is there any setting that i need to change from default for best settings? Or should i just follow the outdated recommendations the best i can?

BTW, no response from Kodi or LE forum.

I will look in to the part that call me a liar :-P