So I'm a bit shocked right now. I'm not sure if anyone is aware of this. I've been using cowboy's bios patch + latest nvidia 330m driver for a while now on windows 10, but I just found something really interesting. As usual, every feature update breaks my nvidia driver, requiring me to reinstall every update. This time, I just wanted to try and see what would happen if I tried to install the original hybrid graphics driver it came with for Windows 7. I have set the bios settings from dynamic to auto with test mode disabled... ... and the switch is working... including the auto brightness. The auto brightness and the brightness key on both stamina and speed are working! I can switch from speed to stamina, but the screen goes black, requiring me to simply put the laptop to sleep and wake it back up (no need to reboot!) I can switch with no problem. Did Microsoft fix the driver compatibility after all these years?? I find this hard to believe, but it's working, right in front of me. This means bios hack is no longer needed to use the nvidia chip anymore on Windows 10 for this laptop. Huh.