hi
... too all users of the vaio grt series ...
... give a try to fedora core 2 ... with no pain you'll get the support for the Fn key, lcd luminosity, jog dial, battery info ... all that we were missing from window$ platform ...
btw ... thanks go to Stelian the developer of the sonypi.o
source and info
here
post how does the module work for you ...
cheers
baronlynx