Comment 5 for bug 1724944

I managed to get some journalctl entries related with the gdm starting error:

abr 09 20:54:01 testuser-VirtualBox generate-config[699]: warning: Failed to read keyfile '/usr/share/gdm/dconf/90-debian-settings': Key file does not start with a group
abr 09 20:54:01 testuser-VirtualBox systemd[1]: gdm.service: Control process exited, code=exited status=1
abr 09 20:54:01 testuser-VirtualBox systemd[1]: gdm.service: Failed with result 'exit-code'.
abr 09 20:54:01 testuser-VirtualBox systemd[1]: Failed to start GNOME Display Manager.

The file '/usr/share/gdm/dconf/90-debian-settings' is an softlink to the file '/etc/gdm3/greeter.dconf-defaults' and suddenly I realized that this is not a bug: it's my fault from the beginning!!! :(

There is another line that must be also uncommented in order to get it to run, the previous 'group one':

   #[org/gnome/login-screen]

and

   # disable-user-list=true

After uncommented both lines the greeter works as expected in Ubuntu 18.04 beta 2: asking for the user instead of showing a list.

But in Ubuntu 17.10 it's still showing the users list. So I think it's fixed in Ubuntu 18.04 Beta 2.

Sorry for the inconveniences.