I have tested it with an empty default-display-manager file. "dpkg-reconfigure gdm" doesn't show a configuration dialog on my system and it doesn't add gdm automatically to the file ... I also had to add it manually.
I have tested it with an empty default- display- manager file. "dpkg-reconfigure gdm" doesn't show a configuration dialog
on my system and it doesn't add gdm automatically to the file ... I also had to add it manually.