I have two RPi 2 and although CEC works just fine I’m unable to go into the CEC settings to modify things. The menu is just blank with nothing in it. I want the TV to turn off when you shutdown the Pi, but cannot.
Going to System -> Settings -> System -> Input Devices -> Peripherals, just get a blank box when I click Peripherals.
What skin are you using ?
This is a skin bug that applies to a number of skins. Sometimes you can just press select on the empty list and go into the settings anyway (Black Glass Nova for example) otherwise switch to a different skin like Confluence while you are changing CEC settings.
I tried with osmc and Confluence but both just show an empty box.
restarted after applying Confluence theme and got the options.