OpenSuse x64 12.1 Samsung R780 with GF 330M

I have a problem with brightness control - I can’t change the level of brightness, how to activate Fn keys?

here is simmilar case but on samsung r580 (almost no difference comparing to r780) and system openSUSE 11.4 - I’m using 12.1

http://forums.opensuse.org/english/get-technical-help-here/laptop/455979-opensuse-11-4-samsung-r580-gf-330m.html
is this sollution safe?