I had downloaded the MDM deb file from the following link. http://packages.linuxmint.com/pool/main/m/mdm/mdm_1.0.4_i386.deb
But when I'm installing through the GDebi package manager, it shows me this error.

It doesn't state anything. Recently I've switched from lightDM to GDM
How can I resolve this error?
lightDMandGDMand both are installed. But this happens only withMDM– Sri Harsha Chilakapati Oct 13 '12 at 0:22