lightdm-gtk-greeter is not a display manager

[Bob Bib]

After the reconfiguring of "lightdm" package:
user@machine:~$ sudo dpkg-reconfigure lightdm
an unexpected config screen appeared (look at the attached screenshots).

Obviously, lightdm-gtk-greeter is not a real display manager.

---

First detection in:
Ubuntu precise (development branch) 12.04 / amd64
lightdm 1.1.9-0ubuntu1
lightdm-gtk-greeter 1.1.4-0ubuntu1

Apport collected info added later.

-----------------------------------------------------------------------------------------
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
NonfreeKernelModules: nvidia
Package: lightdm-gtk-greeter 1.1.5-0ubuntu1
PackageArchitecture: amd64
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Tags: precise
Uname: Linux 3.2.0-22-generic x86_64
UpgradeStatus: Upgraded to precise on 2012-03-31 (6 days ago)
UserGroups: adm admin audio cdrom dialout dip fax floppy ftp fuse kvm lpadmin netdev plugdev powerdev sambashare tape vboxusers video wireshark

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Bob Bib (bobbib)]

apport information

[Lionel Le Folgoc (mrpouit)]

Were you using an unofficial package or something, and then upgraded to the official one?
I'm not able to reproduce on precise. There's no code in lightdm-gtk-greeter to register itself as a display manager, because as you wrote, of course it isn't one. ;-)

[Bob Bib (bobbib)]

No, I haven't used any unofficially packaged lightdm related stuff. Official upgrades only.

Maybe, an old version has modified some configs and they haven't been corrected since that time?

[Sean Davis (bluesabre)]

It is unclear what caused this issue, but we are still unable to reproduce this. Going to mark as Invalid for now.