For my XP Installation I used Driverpacks to integrate latest GMA500 driver from Intel. After that all suspend/gamma were working except OpenGL / FullHD video acceleration.
With the IEGD 10.3 driver I haven't got a configuration panel where
I could adjust brightness/gamma etc.
So I had to test external tools for this use.
Btw:
I tried iRotate yesterday evening to rotate my screen 180° but won't work like the gamma tools, too
No, I haven't tested the driver on Win7.
Decided to stay with XP on my netbook because I'm not
happy with the new UI in Win7.
So the use of Win7 is on my desktop for DirectX10+ games only.