[ubuntu] Toshiba Satellite - brightness adjustment shortcuts Fn+F6, Fn+F7

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http://ubuntuforums.org – Hey there, I've been using ubuntu on my Toshiba Satellite notebook for almost a month now, and I'm extremely satisfied with it. Almost everything works fine, and I haven't had to mess around much to get things going the way I wanted. Regardless of the extensive research I've done on the subject (I always try to fix things by reading other people's experience, without having to bother again and again on the same issue), I couldn't get the FN keys to work on my notebook to adjust the brightness of the screen. I've read something about the gamma, but that's another thing, so the xgamma command just won't help. Then I got to something I instinctively felt closer to the core of the problem, which involved messing around with the .sh files in the /usr/acpi/ dir or something like that, but before editing those, I'd like to know what I'm about to do. In fact the instructions on how to edit them were for different notebook models and I would love not to trash my installation. I thought I could bind some command somehow through the "keyboard shortcuts" application from the preferences menu to get things done, but I'm not sure which command would it have to be (assuming there's one) and someone also wrote the Fn+<key> functions on notebooks are hardware issued commands. Any clues? (Hardware)