I tried to install lightdm desktop manager instead of gdm3 in Jetpack 4.4.1
sudo apt install lightdm sudo dpkg-reconfigure lightdm reboot
System boots without error, lightdm.service works.
When I log out, the lightdm greeter screen (which allows to select users and graphical environment) does not appear, the system returns to the desktop. There is no such problem when using gdm3.
How do I enable the greeter in lightdm?