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Is there a way to programmatically control LCD brightness of the screen connected to RPI over HDMI? As far as I could figure there is really no way to achieve this with RPI over HDMI. What about RPI HDMI to LVDS boards? Does this method give this control? There is a board by chalk-elec that mentions this capability yet I would still like to understand if getting this board is my only way of controlling the brightness of the screen.

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    There is not really enough information to give an answer. Is this a random LCD you have connected to the Pi? How is it connected? Do you mean your HDMI monitor screen? Some details are needed. – joan Oct 10 '14 at 7:33

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