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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: enter image description here enter image description here

Sorry my system is in french :) Affichage meand Display

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    Have you checked if you can still use the power management features to reduce the brightness? – LPChip Apr 18 '15 at 15:28
  • I checked it, but the slider that was there to reduce the brightness does not appear – Xsmael Apr 18 '15 at 15:39
  • Right, so somehow your windows does not detect that your laptop is a laptop. I bet in the powermanagement settings, it doesn't tell you the actions for when on battery power either? – LPChip Apr 18 '15 at 16:09
  • it does, as you can see in the first picture, even if you don't understand french, the icons speaks. – Xsmael Apr 18 '15 at 18:49
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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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  • when I expand display there is no "Enable adaptive brightness" option – Xsmael Apr 18 '15 at 15:44
  • Oh, Then It seems it don't have the sensor or few win-7 this option is not available. try using above listed softwares – Ali786 Apr 18 '15 at 15:46
  • but it was working before! I don't know what happened, and it became like that, i already tried a software which didn't work, so i'm pretty pessimist for those softwares, but as i'm desperate I'll give a try – Xsmael Apr 18 '15 at 15:56
  • The most probable cause might be drivers got corrupted which controls ur display, One of my friend got the same problem solved by installing the drivers. And on Mint (linux) also he faced the same problem. – Ali786 Apr 18 '15 at 16:00
  • which drivers specifically ? i also tried to re-install all my drivers cause i didn't know which one was concerned, but it didn't solve the issue. – Xsmael Apr 18 '15 at 18:49
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  • go to the device manager
  • select the display adapter
  • right click on Intel graphics
  • chose update driver
  • select browse from my computer
  • select let me pick from the device driver on my computer
  • select Microsoft basic display adapter

After this restart the computer and check that brightness is changed or not.

If not then go to device manager-display adapter-this time again select intel hd graphics family like in the above set of steps. After this restart the computer and try to change the brightness.

It will solve problem in 90% cases.

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  • I followed your procedure step by step but i don't get "microsoft basic display adapter" as an option – Xsmael Apr 18 '15 at 20:21

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