Originally Posted by JussiKp
My laptop is Acer TM8104WLMi. There is no contrast control buttons. On Windows I was able to adjust contrast/brightness/gamma from ATI Control Panel.
I got this straight from the Acer manual available at Acer.com:
Fn + right arrow will increase brightness
Fn + left arrow will decrease brightness
So you can adjust the brightness with the keyboard, contrast no, gamma no. Have you installed the ATI driver for Xorg yet? I've never used an ATI card in linux but there maybe a utility bundled with it to adjust gamma and contrast/digital vibrance.