horizontal lines flicker when I start X Dell Insprion 1100

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

Hi, I am running Debian Sarge 3.1 on a Dell Inspiron 1100.  About 1 out 
of every 10 or so times I boot into X my computer crashes and horizontal 
lines flicker off and on on my computer screen.  Does anyone know why 
this would occur?  Have I not configured out correctly?  Anyone with a 
Dell Inspiron 1100 having a similiar problem and could you send me the 
info. you used to configure X?
Cheers,
Chris