When XDM or KDM loads horizontal/vertical bars flicker

[Christopher David Desjardins <cddesjardins@gmail.com>]

Hi-
About 1 out of every 10 times I start x, it starts as usual with the 
hourglass indicating the KDM is loading, but then it freezes and 
horizontal and vertical bars flicker across my screen and then I am 
forced to reboot but then KDM loads properly upon rebooting.  Anyone 
have any idea why this is?  When I used Slackware this never occured.  
Have I encountered some sort of bug or is there something potentially 
wrong with a my xfree86 config file?  I am using a Dell Inspiron 1100 
with Debian 3.1 Sarge and a 2.6.8 kernel.  If anyone else is using an 
Inspiron 1100 and could maybe send me a copy of their config file that 
would be excellent.
Cheers,
Chris