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Automatic brightness / adaptive dimming basically making Ubuntu unusable - Asus UX303L

Ask Ubuntu Asked by MisterTipp on December 26, 2020

My laptop has some sort of adaptive brightness/dimming feature, and while it isn’t an issue on Windows, Ubuntu uses the feature and almost gives me epilepsy. Every other second, the screen either dims or becomes slightly brighter. Sometimes I am writing and it just goes from super bright to almost pitch black. I was playing EU4 recently and the screen just went black, like if it turned off (the light in my room is dark, but not that dark).

My computer is running Ubuntu 18.04, is an asus zenbook ux303ln, with an intel hd and a gt 940m.

How to fix this issue?

2 Answers

There is a guide for turning off adaptive brightness. Here is a summary:

  1. Lift up and open the LCD display panel with your thumb. Press the "Power" button beneath the display to turn the laptop on.

  2. Locate the Function key, labeled Fn at the bottom of the keyboard.

  3. Press Fn+A to turn off the Ambient Light Sensor.

  4. Press Fn+F5 or Fn+F6 to manually adjust the screen brightness.

Answered by WinEunuuchs2Unix on December 26, 2020

Had the same issue. You can just disable the automatic brightness setting. It is under "settings->power"

Hope that works!

Answered by user954501 on December 26, 2020

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