Originally Posted by nielsslot
I send an e-mail to NVidia about this. They send a reply that they are aware of this issue and have it reported as bug #410754. Let's hope this also means they are doing something about it.
I should note that that bug covers the Sony Vaio VGN-FZ38M only
. Every laptop vendor has its own different, incompatible way of controlling the backlight brightness which is why it's so difficult for a unified driver to make it work all of the time and why NVIDIA doesn't even try to provide notebook drivers for Windows.