http://askubuntu.com/questions/21523/screen-brightness-not-changing-on-acer-5742-notebook this solution worked for me.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/764195 Title: laptop screen blacklight brightness always at 100% (even on battery), can't be lowered _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
