Running cec-client on RPi

hey @holg

Can you try to use the raspbian base image instead?
You should change it to FROM balenalib/rpi-raspbian

You might have to install nodejs in the base image.

You can install packages using our install_packages utility. tvservice is already included in the base image and you can install cec utility using RUN install_packages cec-utils

We have colleagues who have been successful in using both cec-utils and tvservice.
Hope this helps