[Help] Adjust screen brightness on HP 6530s???

Hello everybody,

I’am using OpenSUSE 11.1 on a HP Compaq 6530s laptop and I have an inconvenience: I cannot adjust my screen brightness via Power Management tool . What should I do now?

I’m using KDE 4.2 and this is my result of uname command:

root@linux-jln3:~# uname -a
Linux linux-jln3 #1 SMP 2008-12-04 18:10:04 +0100 i686 i686 i386 GNU/Linux

Thanks for read.