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 Windows OS Hub / Windows 10 / Fix: Windows 10 Screen Brightness Control Not Working

June 25, 2018 Windows 10

Fix: Windows 10 Screen Brightness Control Not Working

Some users complain that after a installing or updating Windows 10 build screen brightness control is not working on some laptops. When user tries to increase or decrease the brightness with the keys Fn+F11/ F12/ etc. (depending on the laptop model), nothing happens. All other combinations and functional keys work well.


In most cases, the problem with adjusting the brightness in Windows 10 is related to the display or video card drivers (most often the problem occurs on devices with Intel Graphics and AMD Radeon graphics cards). However, there are other reasons. Consider a few simple ways to fix a problem when you can’t adjust the brightness on a Windows laptop.

Contents:
  • Unable to Adjust Screen Brightness after Windows 10 1803 April Update
  • Disabled Generic Pnp Monitor
  • Update your Graphics Card Driver
  • Fix Screen Brightness Control Bug Using KMD_EnableBrightnessInterface2
  • Switching to the Microsoft Basic Display Adapter Driver
  • Can’t Adjust Brightness after Installing TeamViewer
  • Screen Brightness FN Keys Not Working on Laptop
  • Unable to Change Brightness on a Laptop with Intel HD Graphics

Unable to Adjust Screen Brightness after Windows 10 1803 April Update

Some users are faced with the fact that after updating to the latest Windows 10 build (1803 April Update) they can’t change the screen brightness on many laptop models. Brightness control doesn’t work and is stuck at max level at any position of the brightness slider in the settings. Also it is impossible to change the brightness using the keyboard’s function keys.

Can't control screen brightness after installing Windows 10 1803 April Update

Almost in 100% of cases, the rollback to the previous Windows 10 build (1709) helps to solve the problem with the display brightness. There are simpler solutions for Windows 10 1803.

If the brightness adjustment issue occurs immediately after upgrading to Windows 10 1803, try to install the last cumulative update KB4284835 (OS Build 17134.112, June 12, 2018). According to information from Microsoft, it fixes the problem with brightness control on laptops with Windows 10 1803:

Addresses an issue with the brightness controls on some laptops after updating to the Windows 10 April 2018 Update. 

Check the brightness settings in the: Control Panel -> Power Options -> in the properties of the selected power plan, click the Change advanced power settings -> Change advanced power settings -> expand Display.

In the Enable adaptive brightness item, you must disable the adaptive brightness for the modes “On battery” and “Plugged in”.

Tip. On laptops with an ambient light sensor (available on almost all modern tablets and laptops), adaptive brightness automatically adjusts the brightness of the screen depending on ambient light. If this function is enabled – you can’t significantly increase the screen brightness.

Also try changing the settings in the items:

  • Dimmed display brightness
  • Display brightness

disable adaptive brightness in win10

Disabled Generic Pnp Monitor

If you can’t change the display brightness in the notification panel and in the screen settings, check whether the Generic Pnp Monitor is not disabled in your devices. This is the most common problem on Lenovo and HP Pavilion laptops.

Open Device Manager (devmgmt.msc) and in the Monitors section check if the Generic Pnp Monitor is enabled. If it is not, right-click and enable it.

Generic Pnp Monitor

Restart your computer and try to adjust the screen brightness.

Update your Graphics Card Driver

Perhaps the problem with the brightness is related to the current graphics card driver. First check if your display adapter is enabled in the device manager (similar to the method above).

If the previous method didn’t help, try to update your graphic card driver automatically (if the automatic driver update is not disabled).

In the Device Manager (the same devmgmt.msc console) expand the Display adapters section and find your graphic card. Right-click it and select Update Driver Software. Then select Search automatically for updated driver software and wait till Windows 10 finds and installs the latest driver version (of course, your computer has to be connected to the Internet).

If the automatic driver update didn’t fix the problem, try removing the current driver and installing the latest driver version from the manufacturer’s website.

Fix Screen Brightness Control Bug Using KMD_EnableBrightnessInterface2

The following method implies registry editing:

  • Open the Registry Editor (regedit.exe).
  • Go to
    HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
  • Find the DWORD parameter KMD_EnableBrightnessInterface2 and change its value from 1 to 0.KMD_EnableBrightnessInterface2
  • Since there can be several KMD_EnableBrightnessInterface2 parameters in the registry, open the Find window (F3) and find all other parameters with the name KMD_EnableBrightnessInterface. Change the values of all found keys from 1 to 0.
  • Restart your computer.

Switching to the Microsoft Basic Display Adapter Driver

The last thing you can try, if other methods didn’t help, is to use the standard graphic card driver – Microsoft Basic Display Adapter.

  • In the Device Manager select your graphic card, right-click and select Update Driver Software in the context menu.
  • Select Browse my computer for driver software -> Let me pick from a list of drivers on my computer.
  • In the list of drivers, select Microsoft Basic Display Adapter and click Next.Microsoft Basic Display Adapter
  • The system will replace the current driver.
  • Restart your computer and make sure that the screen brightness can be adjusted with the Fn keys.

Can’t Adjust Brightness after Installing TeamViewer

Some users have faced that the brightness adjustment in Windows 10 doesn’t work after installing the TeamViewer (remote management program). The fact is that TeamViewer adds its own Pnp-Montor Standard display driver to the system, which is used to compress graphics and optimize traffic.

 TeamViewer Pnp-Montor Standard driver

Try to replace the driver for this device to “Generic Pnp Monitor” (Right Click -> Update Drivers -> and select the “Generic Pnp Monitor” from the list of already installed drivers).

Screen Brightness FN Keys Not Working on Laptop

If you found that adjusting the brightness in Windows 10 settings works fine, but the function keys (Fn) of brightness control on the laptop keyboard doesn’t work, most likely you need to install additional software from the laptop manufacturer.

Each laptop manufacturer has its own utilities. Please note that you should download the utilities for the laptop only from the official website of the manufacturer, or from the installation CD / DVD which was supplied with the device. Below are the names of utilities for popular laptop models:

  • ASUS – ATK Hotkey Utility
  • Sony Vaio – Sony Notebook Utilities
  • Dell – QuickSet
  • HP – HP Software Framework and HP Hotkey Support
  • Lenovo – Hotkey Features Integration for Windows 10 or AIO Hotkey Utility Driver

Unable to Change Brightness on a Laptop with Intel HD Graphics

If you have an Intel HD Graphics card installed on your laptop with Windows 10, you can try to fix the problem with the display brightness as follows:

  1. Run the regedit.exe.
  2. Navigate to the following registry key: HKLM\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
  3. Change the value of the parameter FeatureTestControl from f000 to f008.
  4. Restart your laptop.

Or use the following reg file:

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000]
"FeatureTestControl"=dword:0000ffff
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0001]
"FeatureTestControl"=dword:0000ffff
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0002]
"FeatureTestControl"=dword:0000ffff
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\intelkmd]
"FeatureTestControl"=dword:0000ffff

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13 comments

Alex V October 11, 2016 - 5:47 pm

I have tried all of these solutions and it STILL does not work. 

Reply
Bhushan July 22, 2018 - 1:49 am

I tried all still doesn’t work. I am on build 17692.rs_prerelease_flt.180625-1624

Reply
ALEX K November 23, 2018 - 9:49 pm

Thank you SO MUCH! The TeamViewer thing solved the problem for me! I went crazy the past days and I think I will have to hugely apologize to my display adapter wo got reinstalled a very lot of times, recently. Pfew! Thanks a lot for that hint!

Reply
admin November 27, 2018 - 6:41 am

You are welcome :). It was also a surprise for me that the TeamViewer causes problems with brightness control in Win10.

Reply
Tivadar Limbacher February 23, 2019 - 6:17 am

Wonderful, thank you SO MUCH! The “Generic monitor” switch helped bring back the screen brightness adjustment! You’re a lifesaver! 🙂 Very professional post!

Reply
molda May 21, 2019 - 8:51 pm

Fantastic article!!!!!!!!
More than 1 year with this problem.

Thanks a lot!!!!

Reply
Ryan B July 27, 2019 - 4:40 am

I had to change the FeatureTestControl DWORD to fb20 (f008 didn’t work for me), and I found it in 0001 (not 0000).

Reply
ww November 17, 2020 - 10:49 am

thank you for tip. I did use f008 value, but found it in 0001 (not 0000). Life saver.

Reply
AleM August 30, 2019 - 9:18 pm

thanks.

Reply
ruel September 18, 2019 - 10:53 pm

thank you very much.. i changed the hex value to F008 and it works..

Reply
Sam January 24, 2020 - 6:04 am

Thank you. I have an AMD Radeon HD 7310. The fix that worked was the registry change.

Changed KMD_EnableBrightnessInterface2 from 1 to 0.

I found the KMD_EnableBrightnessInterface2 values in the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{4d36e968-e325-11ce-bfc1-08002be10318}\0000
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\amdkmdag]

Reply
qumail August 14, 2020 - 2:17 pm

THANKYOU SO MUCH, i had the problem with intel hd graphics and last solution worked for me. since so many month I was using my computer like this and changing brightness for bios settings only.But thanks to this website

Reply
shuaigood October 19, 2020 - 6:11 am

My DELL M6600 laptop with Intel HD Graphics card can control its brightness now, TKS

ref to “Unable to Change Brightness on a Laptop with Intel HD Graphics”

Reply

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