FN Keys in Lenovo X300

[crsnet.pl]

 Hello.
 Im searching for any information about FN Keys.
 I make it working under FreeBSD 8/9.
 Speaker Off key and Light key works, Volume +/-, Brightness +/- dont ;/

 [cr4sh at x300 ~]$ uname -a
 FreeBSD x300 9.0-BETA3 FreeBSD 9.0-BETA3 #3: Tue Sep 27 10:47:57 CEST 
 2011     cr4sh at x300:/sys/amd64/compile/GENERIC  amd64
 [cr4sh at x300 ~]$ kldstat | grep ibm
  7    1 0xffffffff81610000 5b28     acpi_ibm.ko
 I try to use /usr/ports/deskutils/tpb port, but with no luck.

 Regards, Adrian.