R610 Samsung brightness

[pazzoinformatico]

Hello world.
I have got an R610 Samsung; I installed ubuntu 9.04 on it.
I installed the driver of nvidia(9200) and after installing the brightness applet doesn't work; and the key fn doen't work.
So i need so help, because the brightness cosumes a lot.

[xcell]

Asked the same question a couple of months earlier in this thread: http://ubuntuforums.org/showthread.php?t=1072501

Still haven´t found the answer or a workaround though...