http://askubuntu.com/questions/21523/screen-brightness-not-changing-on-acer-5742-notebook
this solution worked for me.
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https://bugs.launchpad.net/bugs/764195
Title:
laptop screen bla
same here - since i've updated to 11.04, i can't change brightness with
Fn + Up/Down (dell vostro 3700 with nvidia gt330)
please fix this..
thanks,
P.P.
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