The xrandr command to reduce brightness below minimum is not working after upgrading Ubuntu to 19.04. How can I reduce the brightness below the default minimum?
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ThunderBird
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Shashank
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have you tried `xbacklight`? – BeastOfCaerbannog Jun 14 '19 at 14:40
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See this script: https://askubuntu.com/questions/1150339/increment-brightness-by-value-using-xrandr/1150409#1150409 also make sure you signed into with Xorg and not Wayland. – WinEunuuchs2Unix Jun 14 '19 at 15:10
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Here is the simple step to control brightness in Linux based system
First, you have to know the monitoring screen connected you.
To know this run this command
xrandr -q
It will give useful information about the screen
( Here my screen connected to eDP, It might be different for your system )
After knowing that run the below command
xrandr --output eDP --brightness [0-10]
Replace eDP by your connected screen from the above output and you can have normal brightness values from 0.1 to 1.0
Hope it helps you
Mir Rahed Uddin
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