I have recently installed Ubuntu 12.04 on my Samsung laptop RV509 with Nvidia grahics card but brightness remain unchanged. How can I make the brightness control work?
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The answer to this question http://askubuntu.com/questions/38845/samsung-netbook-n150plus-screen-brightness-not-working may help you. – Simon Aug 11 '13 at 10:55
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You can change it using xbacklight
Install it from terminal sudo apt-get install xbacklight
Change brightness by xbacklight -set <level>, where <level> is an integer ranging from 0 to 100 (lowest brightness to highest).
For example, to set medium brightness one would use
xbacklight -set 60
Hasiya
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