How to install LXDM instead of GDM3?

Question

I'm running Debian Wheezy and my default Display Manager is GDM3, and I would like to replace it with LXDM. The problem is that I'm trying to run # apt-get install lxde and it's not working, what am I doing wrong?

My /etc/apt/sources.list is:

deb cdrom:[Debian GNU/Linux testing _Wheezy_ - Official Snapshot i386 DVD Binar$

deb http://ftp.br.debian.org/debian wheezy main
deb-src http://ftp.br.debian.org/debian/ wheezy main

deb http://security.debian.org/ wheezy/updates main contrib
deb-src http://security.debian.org/ wheezy/updates main contrib

Solution

It looks like lxdm is not present in Debian wheezy; at least, it's not included in any packages according to the results of a package contents search. You may need to install it from source or from a third-party repository.

If you did install an alternate display manager via dpkg, however, you would want to run something like dpkg-reconfigure gdm3 to get a display-manager chooser.

Debian's display manager startup scripts look at the contents of /etc/X11/default-display-manager to see whether they should run. If you install one manually, you will probably need to empty that file and add your own startup script.