I have a Sony Vaio CW series laptop with GT230M. I tried to load the driver but it failed to load by telling me that there are no supported Nvidia chips. So I took the PCI ID of the card from http://us.download.nvidia.com/XFree8...ppendix-a.html
and added it to DEFINE_PCI_DEVICE_TABLE and recompiled the driver. The driver loads this time, but brightness control still does not work.
Just to let you know...