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Why is there no brightness option on my Ubuntu 11.04 Sony Vaio E series NVidia 410M

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linux-howto

http://askubuntu.com – I am facing this problem that my brightness remains maximum and function keys don't change anything. I have tried almost everything related to it, from installing NVidia drivers to running almost all the commands posted by many, which worked for them, but its not helping me out.. I can not even find the brightness option in power management, system setting or anywhere. My /etc/X11/xorg.conf file is empty. I have even installed monitor setting from Ubuntu Software Center, but it does not open, it says: No monitor supporting DDC/CI available. (HowTos)