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Screen brightness with Ubuntu 11.10 on HP Pavillion Dv3

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linux-howto

http://askubuntu.com – I can not adjust the screen brightness on my HP Pavillion Dv3-2154ca, using Ubuntu 11.10. My Fn-f7/f8 keys don't work (they just show a changing screen brightness bar, with no effect), and adjusting 'screen brightness' does nothing as well. I'm new to Ubuntu/Linux, so simple answers would be much appreciated! (HowTos)