Screen Brightness on Lenovo 3000 N200

I have a Lenovo 3000 N200 type 0769 laptop which previously ran OpenSUSE 11.0. After upgrade to OpenSUSE 11.1, the screen brightness keys no longer work (did work under OpenSUSE 11.0):(. After searching others’ posts on the problem, I found that I could adjust brightness during the boot process, but only up to the grub boot selection. After selecting OpenSUSE from the grub menu, the brightness keys are dead. Since the keys appear to work through BIOS during the boot process, is there something I could disable that would allow the brightness keys to continue communicating with BIOS after OpenSUSE launches?

Further finding: xbrightness app allows me to change brightness after OpenSUSE X session launches. Using xbrightness, I can issue commands in terminal:

‘xbrightness 40000’ for low brightness
‘xbrightness 50000’ for medium brightness
‘xbrightness 60000’ for high brightness

From ‘xbrightness --help’:

"xbrightness builds a brightness ramp for X11.

usage: xbrightness BRIGHTNESS GBASE ]

where BRIGHTNESS is a number from 0 to 65535.
where GBASE is a float number from 0.0 to 10.0. (default=1.0)"