Windows – I cannot reduce the brightness of the laptop’s screen monitor

brightnessdisplaylaptopwindows 7

Since a while i'm not able to reduce the brightness of my screen I don't know why!

I've tried using the shortcuts but it doesn't work but the other shortcuts work like for the volume, the wifi…
I tried doing it manually through the control panel, but i cannot see the brightness setting (slider) anymore!
And my brightness is at the highest level, this is very irritating especially during the night.
I re-installed my laptop drivers and still nothing!
I have a ACER ASPIRE E1-531G

And something else i noticed is that i can reduce the brightness (using shortcut) when the computer is booting but after logging in, there is no way to do it.

what can I do to solve this ?

EDIT:
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Sorry my system is in french 🙂 Affichage meand Display

Best Answer

From Microsoft official help document.

Adaptive brightness is a feature in Windows that uses a light sensor to automatically adjust the display brightness to match the lighting conditions in your computer's surroundings. To use adaptive brightness, you must have light sensors installed and enabled on your computer.

To determine if your laptop or computer monitor supports adaptive brightness, look for the Enable adaptive brightness setting in Power Options (mentioned in the following procedure) or check the information that came with your computer.

To turn adaptive brightness on or off

-Open Power Options by clicking the Start button Picture of the Start button, clicking Control Panel, clicking System and Security, and then clicking Power Options.

-Under any plan, click Change plan settings.

-Click Change advanced power settings.

-In the list, expand Display, and then expand Enable adaptive brightness.

-To turn adaptive brightness on or off when your computer is running on battery power, click On battery, and then, in the list, click On or Off.

-To turn adaptive brightness on or off when your computer is plugged into an outlet, click Plugged in, and then, in the list, click On or Off.

-Click Apply. Click OK.

Or You can use any of the software mentioned in below website. https://www.raymond.cc/blog/software-to-adjust-monitor-brightness-and-contrast-for-dell-studio-one-desktop/

http://adjustlaptopbrightness.en.softonic.com/

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