[grizzledyoungman]

HDMI CEC & ARC = a BiG Can of Worms. What works for one persons setup is completely stuffed for someone else.

Good luck with that CEC adventure because you need it !

I strongly suggest not using “Suspend” at all but have everything Power OFF / ON via CEC if you can get it to work.
I power the N2 - OFF / ON via Infra Red which CEC powers up the TV and that seems to power up the AVR.

N2 HDMI goes direct into the AVR.

Kodi GUI settings not sticking, I suggest you rename Kodi GUI file and reconfigure settings from scratch..

Code:

systemctl stop kodi
mv .kodi/userdata/guisettings.xml .kodi/userdata/guisettings.xml.temp
reboot

Good feedback!  I'll pursue that in the following order:

1. Try having CEC make the N2 power off instead of suspend
   
2. Resetting GUI settings using the provided method.  Question: will I have to reconfigure my shares and library?
   
3. Having my Harmony setup do on/off via IR.  Is there a guide or reference for this?
   
4. If all else fails, I could disable CEC on the N2.  Is there a way to do that via config file that is more durable?
   

Thank you!