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How to set display contrast or gamma Freescale_Yocto_Project

Question asked by ark ceajin on May 19, 2015
Latest reply on May 28, 2015 by ark ceajin

OS: Poky ( Yocto Project Reference Distro ) 1.6.2

Board:  i MAX6Q
I am trying to adjust the display contrast  by this command:

xrandr --output output_name --gamma 1:1:1


Result as fellow:

Desktop Ubuntu : work fine
Yocto : not work