[expert] Window Managers

[Dennis Robertson]

Hello List,
As a consequence of installing XFree86 4.0 I have lost the link from the
window manager selections on the login screen to the various window
managers.  Perhaps I shouldn't have answered yes to all the overwrite
questions during the install of 4.0.  No matter what I select I get
KDE.  KDE is the only entry in a new file /etc/sysconfig/desktop.  (This
file doesn't appear in 3.3.6.)
Can anyone tell me how to repair the login screen, please?
TIA.