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Tags: nvidia   hp   backlight  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

URL: https://askubuntu.com/q/1002694
Title: Adjusting the display backlight on HP ZBook 17 G4 with Nvidia Graphics
ID: /2018/02/03/Adjusting-the-display-backlight-on-HP-ZBook-17-G4-with-Nvidia-Graphics
Created: February 3, 2018    Edited:  June 12, 2020
Upload: November 24, 2022    Layout:  post
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Adjusting brightness with software controls

When you lack hardware controls to adjust brightness the only option is via software.

Find your monitor name using xrandr

Run this command to find monitors connected to xrandr:

$ xrandr | grep connected | grep -v dis
eDP-1 connected primary 1920x1080+0+1080 (normal left inverted right x axis y axis) 382mm x 215mm
DP-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 1107mm x 623mm

For me it is eDP-1 but on your system it is DP-3

Set –brightness in xrandr

You can set brightness to screen off 0 to full bright 1.

You can set it above full bright ie 1.5 but your colors will become overly saturated.

A good starting point for a screen that is too bright (hard on your poor eyes) is .5

xrandr --output DP-3 --brightness .5

From there you can adjust accordingly.

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