Posted by: HD PVR
Right. KDM is developed specifically for the KDE plasma desktop, though. While some features may work on Ubuntu, it won't be 100% compatible with vanilla Ubuntu because it uses the GNOME desktop. Try GDM, which is the GNOME implementation of the X11 display manager (XDM).
I tried GDM as well and found that it is too plain and changing just the background of the login screen is so hard. Am I right? Or do you think changing the background customizing the GDM login screen is easy?
Also, so does this mean that I shouldn't be / can't use kdm while using ubuntu 12.10 unity?
[Edited on 12.06.2012 2:02 PM PST]