Re: Brightness control not working with nVidia driver
The brightness bug is not limited to the GeForce 8M. I have a GeForce4 440 Go with the same issue. Whatever the problems are, they span the product lines.
Some people have working configurations, and assume that the problems are user configuration related. This is not the case. I've confirmed that the same notebook with the same hardware and software will have working or not working brightness controls depending on whether an external monitor is connected or not, for example.
Since we have no access to the source, only Nvidia can correct these issues. The only thing we can do is wait (for years), assuming we still have the hardware by then.