I was following th thread on CEC-client on RPI. And note that the direction suggested was CEC-CTL.
On the generic nightly matrix image it is not there. Is there a reason for that? It would be good to have cec-ctl available on the Intel NUC.
I was reading this reference. I have some issues with the way that my CEC environment behaves, and being able to pass though commands to the CEC devices would probably give me a good workaround.