I have a Lenovo IdeaPad Yoga. It's been working flawlessly with Windows 8 - 9 hour battery life, awesome touchscreen, 4-second boot times.
So obviously I wanted to try Ubuntu 12.10. Well, I downloaded it and installed it - but I couldn't change the brightness!
These hotkeys work in Windows but not in Ubuntu - and none of the solutions others have proposed in other similar questions with Lenovo laptops have worked.
How can I make my brightness hotkeys work?