The author begins referring to "login manager" right after listing a different phrase in the title, "Display Manager".
IMHO, a display manager is not a login manager. The login manager handles just the part of the process that gives the user a place to login and interfaces with the OS authorization process to recognize the user. The display manager can provide a login manager, but primarily handles the starting of the rest of the graphical interface by starting a new session on a local or remote system.
In the first place a user is given the green light to use the system, but nothing further occurs. In the second, the user is given the interface with which to work.
I think we need to be a little more precise and clear, and there should be more details.
- Wikipedia is always a good resource in this regard: Wikipedia:X display manager (program type).
- I've always used the terms interchangeably... -- pointone 10:32, 27 November 2009 (EST)
- I know, many do. I'm sure I have as well. It's sort of epidemic out there. However, it appears clear that there does need to be a distinction because of the difference in actual duties of the two. - KitchM 16:46, 27 November 2009 (EST)