I am working with Ubuntu MATE (16.04) on a Raspberry Pi 3. I disabled LightDM with
sudo systemctl disable lightdm
On the next boot LightDM did not show up again and instead I just got a terminal asking me for my credentials, what was exactly what I wanted. When I am log in and type
the grapical sessions shows up, so far so good.
Now I want to get LightDM back after boot and so I tried reenabling it with
sudo systemctl enable lightdm
The output is:
Synchronizing state of lightdm.service with SysV init with /lib/systemd/systemd-sysv-install... Executing /lib/systemd/systemd-sysv-install enable lightdm
But when I now reboot my system, LightDM does not show up again. What went wrong?
In addition to that, when I just log in in terminal and type
sudo systemctl start lightdm
LightDM is started normally, i.e. the graphical session is started and the login screen is shown. How can I get LightDM started automatically after boot again?