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Tags: brightness   backlight   ubuntu-mate  
Link: πŸ” See Original Answer on Ask Ubuntu πŸ”—

URL: https://askubuntu.com/q/887575
Title: My laptop screen reduces light on dark applicatins
ID: /2017/02/26/My-laptop-screen-reduces-light-on-dark-applicatins
Created: February 26, 2017    Edited:  February 26, 2017
Upload: November 24, 2022    Layout:  post
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Temporary change for current session

To enable or disable the Ambient Light Sensor (ALS) using the keyboard:

From (What is the Ambient Light Sensor feature on a portable computer - Dell)

Permanent change across boots

You can turn off Ambient Light Sensor (ALS) within the BIOS. However, older posts in some forums suggest the BIOS (Press F2 on boot) didn’t provide options for disabling the ALS. Answers on those forums say a BIOS update from Dell was necessary.

If you don’t find an option in BIOS for turning off ALS permanently, check Dell support site for BIOS update. Entering your system tag number is the easiest method else you’ll have to manually locate the relevant drivers.

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