After a software remove on my Debian 10.3 XFCE, apt package manager advised that a lot of packages that I really need can be removed because they was "automatically installed":
That are really bad news because if I want to remove a package in the future with the
apt --purge autoremove command (e.g.), my system could be breaked. So I just remember have been removed
xserver-xorg-video-nouveau and, after reinstalling that package, the trouble persist.
The real issue was that apt have been removed more than that package, and just installing it again could be solved the dependency tree.
Solution in answers.