Can't disable auto screen dimming on ASUS laptop Windows 10

All we need is an easy explanation of the problem, so here it is.

When I open a dark window like Discord, my laptop’s display dims. When I minimize it and open something white, it takes a while for the light to go back up and it gives me a headache.

I’ve tried setting the Intel-something settings for the battery by disabling some option, but there’s no way to disable it for when my laptop is on an adapter. I’ve heard that there’s a DCPolicy-something registry key that I need to change, but that registry key doesn’t exist. What should I do?

I have a Windows 10 ASUS laptop X540SC.

How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

Below are three methods which are supposed to disable Adaptive Brightness.
Only one is theoretically required, but I list all three in the order of
their likelihood of working out.

Use the Intel Control Panel to set the
Intel HD Graphics
for the power source On battery so as to disable
Display Power Saving Technology :

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You may also in PC Settings, System, Display,
turn the Change brightness automatically when lighting changes to Off.

This option should be available if your computer has a light sensor.
If it is missing, check the manufacture’s website for the correct driver and/or software package, if Windows 10 support is provided for your computer.

Edit also the group policy
Computer Configuration > Administrative Templates > System > Power Management > Energy Saver Settings and set both policies to Enabled at 0%.

For Windows editions of Starter, Home and Home Premium which do not include
the group policy editor, see the post :
Windows Starter Edition, Home and Home Premium do not include gpedit, how do I install it?.

Method 2

Make sure Enable adaptive brightness is off for both battery and plugged in.

Find this option in Control Panel -> Power Options -> Change Plan Settings (for your active plan) -> Change advanced power settings -> Display

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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