[PROBLEM] Can not control XMBC through CEC HDMI Onkyo AVR with it's remote control

[jakenl]

I can't get XBMC to cooperate with my Onkyo remote control through the HDMI cable, it won't find anything within XBMC

My setup:
RPI 2 with Xbian -> HDMI -> Onkyo TX-NR535S (AVR) -> HDMI -> 1980x1200 Dell pc monitor

Actions in RPI:
When I go to the settings @ pheripical devices, I see something mentioned about the CEC, but with the following parameters
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generic_video,hdmi_video
Product ID: 0000 Manufacturer (I think this is the English equivalent) 0000
Class: video Version: Unknown
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When I click on that box, I can only choos whether it should remember it's resolution setting at reboot, if I remember correctly, nothing that has to do with the remote control

Actions in the Onkyo AVR:
I put CEC on. It says "connecting...." and then "raspberry", so it seems to find it. I switched HDMI cables once from a 0.5mtr to 1.5mtr and back, but no result.

Anywhere I read on the internet, I read that it should work 'out of the box', but I'm stuck.