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. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/1724944 Title: gdm3 doesn't start with disable-user-list=true option enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1724944/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs