Ubuntu – How to adjust contrast with xcalib


I'm trying to adjust contrast on my laptop, a ThinkPad E430, running ubuntu 12.04:

xcalib -co 70 -a
xrandr --output LVDS1 --brightness 0.7 

Either of them works only for 1-2 seconds and after that contrast drops to its normal setting by Ubuntu. What should I do to prevent this action?

Best Answer

This is a workaround that achieves the same goal:

xbacklight -set 77
redshift -t 6100:6100 -g 0.8:0.8:0.8
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