mdm [options] mdmsetup [options]
MDM is a replacement for XDM, the X Display Manager. Unlike its competitors (X3DM, KDM, WDM) MDM was written from scratch and does not contain any original XDM / X Consortium code. MDM runs and manages the X servers for both local and remote logins (using XDMCP). See https://github.com/linuxmint/mdm/ for more details.
mdm is main executable. mdmsetup is a graphical tool for easily changing the most commonly used options.
For full documentation see the GNOME help browser under the Applications / System Tools section.
mdm and thus also mdm accept the following options: -nodaemon
Do not fork into the background
No console (local) servers to be run
Preserve LD_* variables
Print the MDM version
Print simple description of accepted options
mdmsetup accepts all standard GNOME options.
Configuration is done either by running mdmsetup or by editting the /etc/X11/mdm/mdm.conf (usually, could also be /etc/mdm/mdm.conf) file. The graphical tool does not support all the options possible so editting the configuration file is sometimes necessary.
MDM is being written and maintained by George (Jiri) Lebl <email@example.com> based on the original codebase by Martin K. Peterson <firstname.lastname@example.org>.
X(7x), xdm(1), Xsecurity(7x), Xserver(1),