why are so much gdm processes are running?

[drago01]

On Sat, Apr 11, 2015 at 10:51 AM, Joachim Backes
<joachim.backes at rhrk.uni-kl.de> wrote:
> Hi all testers,
>
> I'm running f22 with gdm as login manager and GNOME SHELL as desktop.
> Now I saw that a lot of processes are running as gdm, although no other
> "normal" user is logged in.
>
> For example _gnome-session_ or _gnome-shell_ are running:

That's the gdm session itself. The login manager is just another mode
of gnome-shell.