Finally, got back the brightness control in windows 7 on my Vaio CS17

Had a tough time trying to get the brightness control to work after installing windows 7 on my Vaio CS17G, which came with vista originally installed.Every time i pressed the Fn+F5 or Fn+F6 the display bar moved by one block, but there was no change in the brightness. Windows mobility centre didn’t have the brightness option.

Finally got hold of the correct driver upgrade version from the Sony Australia, which did the job. 
Windows 7 Upgrade NVIDIA Graphics Driver Upgrade Version 8.15.11.8640
This program will upgrade NVIDIA Graphics Driver to version 8.15.11.8640.
Although it says that this is applicable only to VGN-CS36GJ, VGN-CS38GD, VGN-CS36TJ, VGN-CS36MJ, VGN-CS37GH, VGN-CS28GD, VGN-CS36SJ, VGN-CS27GJ: it worked without a hitch for me on my Vaio CS17G.

Now i have brightness changing with Fn keys and also on power on/off and i have brightness control from windows mobility centre as well.

Download the driver from here.

Ubuntu Natty Beta on Sony Vaio CS17

I am posting some screenshots of natty beta running on my sony vaio CS 17.

What works: Unity looks great, works after installing nvidia additional drivers.
                       Fn keys for volume work out of the box.

 Hiccups:     Brightness keys do not work, will try to tweak with nvclock.
                    Media keys do not work, pressing media keys brings up right
                    click menu.
                    Touchpad randomly stops responding and makes the box
                    unusable needing reboot.

will post in detail after i use it for a while...