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[ubuntu] Unable to adjust screen brightness

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linux-howto

http://ubuntuforums.org – I have a gateway m-series laptop, and I just recently installed ubuntu 9.04 (x64) in attempts to broadening my OS use. For the most part this is working great, but my current issue is with my screen brightness. When attempting to adjust the brightness either through ubuntu or on my keyboard(fn+up or down) ubuntu shows that I am adjusting the brightness but there is no actual change. Any help would be greatly appriciated (Hardware)