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Where are adaptive display brightness settings (dim the screen on idle)

I've installed Windows 7 RC on an Asus EEE 1000 netbook with Intel Mobile 945 Express graphics installed using default Windows 7 driver (which was updated via Windows Updates after installation).  I noticed that the screen will just turn off in the time set in power settings, but it does not dim beforehand.  I've read that Windows 7 has an "adaptive display brightness" setting that will dim the screen after a set period of time as an intermediate step before shutting it off.  I assumed I'd find a "dim screen after..." setting in the power settings, but can't find it.  Where should I be looking?  Is there a chance that my graphics driver doesn't support it and thus the setting doesn't appear?
2 Solutions
Windows can't control the brightness of the screen without there being specific drivers for the laptop that let you control the brightness of the screen in software. I know my laptop controls screen brightness in hardware, not in software. I can't alter the brightness via any means of just clicking around with my mouse. I have to hold FN+brightness up, or FN+brightness down. This is because panel brightness is a feature of the LCD panel, and not the graphics card.

So I wouldn't expect it to work on anything except hardware specifically designed to support it.
On some laptops you are able to modify it in the power management settings, the windows mobility center (Windows key + X), and other locations.  See this paper from Microsoft to check if your laptop supports these features.

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