I don't know why, but the webcam starts to run (not 100% accurate, but it's showing images, great step).
That is what I did. First, install the uvc drivers, no changes.
Second, big changes. Update the kernel to 18.104.22.168, but still no results. Same "green screen".
Third, install LXDE (thanks to the "search" in the forum, i could find the solution to install it). And change to gdm to session manager. Reboot, and "voilá". Now have "some" images, but we are in the right path.
I will continue posting my results, in case it's useful to anyone.
And... sorry my poor english (my native language is spanish, i'm from Argentina).