built in displaye dim

just got SUSE 11.3 on my new HP G62-a11SE laptop HP G62-a11SE Notebook PC (WZ679EA) specifications - HP Home and Home Office products

when installing the OS the built-in monitor back-light turn off (i can see the setup screen on the monitor).
the problem happens just after the following line execute

starting service gdm

i’ve manged to install the system using my CRT (the old monitor) .
i’ve notice that the same problem happens with Ubuntu 10.4

i really need a solution for this problem since i’m expecting to instal SUSE on a couple of computers (will not cary my CRT monitor with me…;-))

any one found this problem familiar??