Brightness again. Smsng n310

[Guest]

Hi there. Fo first, just installed Kubuntu 9.10 for netbooks, and i can say that kubuntu team has done an awesome work. Distro is very nice
So on my netbbok samsung n310 i cannot control display brightness. Anyway (xrandr, xbacklight, acpi..)
Xorg.conf is clear.
Here is some outputs:

root@acey-laptop:/proc/acpi/video/GFX0# ls
DD01 DD02 DD03 DD04 DD05 DOS info POST POST_info ROM

root@acey-laptop:/sys/class/backlight# ls
root@acey-laptop:/sys/class/backlight# (yea, its empty=)))

/proc/acpi/video/GFX0$ xrandr --output LVDS1 --set BACKLIGHT combination
X Error of failed request: BadName (named color or font does not exist)
 Major opcode of failed request: 149 (RANDR)
 Minor opcode of failed request: 11 (RRQueryOutputProperty)
 Serial number of failed request: 25
 Current serial number in output stream: 25

So, i readed large amount of webpages on google. Nothing work.