xrandr not working on ubuntu 19.04. How to reduce brightness below default minimum?

Question

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?

Answer 1

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