kdm

root@moroni:/lib/systemd/system# systemctl status kdm.service
* kdm.service - LSB: X display manager for KDE
   Loaded: loaded (/etc/init.d/kdm)
   Active: active (running) since Thu 2015-08-13 14:38:51 CEST; 3min 58s ago
  Process: 1199 ExecStart=/etc/init.d/kdm start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/kdm.service
           |-1241 /usr/bin/kdm
           |-1270 /usr/bin/X :2 vt9 -br -nolisten tcp -auth /var/run/xauth/A:2-EmhtJb
           |-2039 -:2
           |-2061 /usr/bin/X :1 vt8 -br -nolisten tcp -auth /var/run/xauth/A:1-FkbjGa
           |-2080 /usr/lib/kde4/libexec/kdm_greet
           |-2084 -:1
           |-2085 /usr/bin/X :0 vt7 -br -nolisten tcp -auth /var/run/xauth/A:0-ToXNsc
           `-2086 /usr/lib/kde4/libexec/kdm_greet

root@moroni:/lib/systemd/system# systemctl status gdm.service
* gdm.service - GNOME Display Manager
   Loaded: loaded (/lib/systemd/system/gdm.service; enabled)
   Active: inactive (dead)


root@moroni:/lib/systemd/system# ls -l gdm*
-rw-r--r-- 1 root root 808 Apr  4 10:01 gdm.service
lrwxrwxrwx 1 root root  11 Apr  4 10:02 gdm3.service -> gdm.service


root@moroni:/lib/systemd/system# ls -l kdm*
ls: cannot access kdm*: No such file or directory