I have the same laptop 5635Z and experiencing the same bug. I've found
someone on the forum pointed out that this is due to incorrect detect of
TV output hence the main display is turned off. Look at this:
http://www.mail-archive.com/dri-
de...@lists.sourceforge.net/msg44165.html
With his patch
For your verification, connect an external monitor via Laptop's VGA
connection and turn on, it should display the booting process, then GDM
without problem. AFAIK this is a show stopper for Karmic, most of the
laptops with Intel GMA suffered this problem. It definitely have to be
fixed in Karmic
