stopping resolution switching with xdm, gdm etc.

[Roy Pluschke <rjplus@shaw.ca>]

I recently tried installing a graphical login screen after years of just 
typing startx.  Is there a way of stopping the ?dm family of display managers 
from resetting the display resolution as it goes from the login screen to the 
persons desktop and back.  On my box it shows a jumbled graphics screen in 
between switches and look rather unproffesional -- whats worse is that it 
occasionally hangs the system (1 out of 50 times).

Thanks in advance
RJP