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[ubuntu] Unable to adjust screen brightness

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linux-howto

http://ubuntuforums.org – I recently installed Ubuntu 9.04 (x64) on my gateway m-series laptop. Works great minus the fact that I can adjust the screen brightness. when using an applet or my keyboard, ubuntu shows that it is being adjusted, but the actually screen brightness is constant(100%). Besides the fact that it is killing my battery, my eyes dont really adjust well to it. I am new to linux and would appriciate any help. Thanks (Hardware)