KDE won't start

[gumbo]

I think I messed up something in my linux box.
I chose another windows manager from the kde start menu and now when I reboot, KDE doesn't start, a message says XDM is not my default display manager. How can I fix this?
The system boots but I am stuck with the console....

I am on a Kanotix Debian.

Please someone help me....

Thanks

[gumbo]

This is what I get when KDE is supposed to start:

Starting K Display Manager: kdm
Not starting X display manager (xdm); it is not the default display manager.

After this KDE don't start anymore....

[a thing]

Just start it manually:
echo startkde>~/.xinitrc
startx

Causes less trouble than a display manager.

[gumbo]

I tried what you suggest but I get the following errors:

(==) Using config file: "/etc/X11/XF86Config-4"
(EE) No core pointer device specified
(EE) Unable to deetermine the screen layout
(EE) Error from xf86HandleConfigFile()

Fatal server error:
No screen found

When reporting a problem related to a server crash etc etc............

XIO: Fatal IO error 104 (Connection reset by peer) on X-server ":0.0"
after 0 requests (0 known processed) with 0 events remaining.

[a thing]

Post your /etc/X11/XF86Config-4.

[gumbo]

Thank you very much for your help.

I have solved the problem overwriting the XF86Config-4 file with the old one.

Now everything works again as usual.
Thank you so much again for your help !!!