How to make HDMI-CEC work on Odyssey + Ubuntu?

I’d like to get HDMI-CEC to work with my new Odyssey Blue running Ubuntu 20.4

First I installed what (I think) I need:
sudo apt-get install cec-utils libcec-dev

Now cec-client cannot find a device, while the Odyssey is connected
to my TV which has CEC enabled:

cec-client -l

results in:

libCEC version: 4.0.4, compiled on Linux-4.4.0-176-generic ... , features: P8_USB, DRM, P8_detect, randr, Exynos, AOCEC
Found devices: NONE

Any ideas what I need to do to make this work?

I should add that the same steps on a RPi worked and a device was found, so it’s definitely not a problem with the TV.

Sorry,Odyssey not support CEC function.

I guess, I can stop trying then…

Thanks for the info!