How does wdm detect and store window manger sessions?

[bxuefeng <phyrster@gmail.com>]

Hi list, 

I am using wdm as an alternative to xdm as the display manager. 

In the drop downlist file, there are choices of installed window managers.
But after I compile and install another one instead of using debian's pkgs, I
don't know where to add it to display mangers like wdm. 

How to register a window manager to a display manager like wdm?



regards

bxuef

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