How to Fix Laptop Brightness Won’t Change on Windows?

Laptop users suffering from an issue in which they are unable to change the brightness of their laptops. Three different issues were reported related to this brightness issue. Some users cannot change the brightness level using a slider, and others have managed to use the slider, but nothing happens when they slide from left to right.

How to Fix Laptop Brightness Won't Change?
How to Fix Laptop Brightness Won’t Change?

The main reason that can cause the issue is a corrupted video driver as it uses to provide and control brightness. PC users don’t need to worry about it as they can control or adjust their brightness using the monitor buttons.

1. Download The Same Driver in Compatibility Mode

If you have recently downloaded the video card driver, we advise you to uninstall it and install the same driver in compatibility mode for the lower version as most of the affected users have managed to resolve the brightness won’t change issue. The reason behind using compatibility mode is when a driver is created for the lower version of Windows and does not run properly in the latest version, installing the driver in compatibility mode prevents the issue and also runs the driver properly in the latest version.

  1. To do that, first, go to the Graphics card manufacturer’s website
  2. Download the same or the latest driver
  3. Right-click the installer and click Properties

    Go to Driver Properties
    Go to Driver Properties
  4. Go to the Compatibility tab and tick Run This Program In Compatibility Mode For
  5. Select Windows 8 or lower from the menu
  6. Click Apply, then click OK

    Installing Driver with the Lower Version
    Installing Driver with the Lower Version
  7. Now run the installer and follow the on-screen instruction to install the driver.

2. Update to the Latest Driver

Having an outdated driver can be involved in causing brightness not changing issues, as drivers are important for controlling brightness. Therefore, make sure you are using the latest video card driver. Follow the steps:-

  1. To download the latest driver, go to the manufacturer’s website
  2. Search for the latest driver and download it
    Download Latest Driver
    Download Latest Driver
  3. Once done, install the driver and check if the brightness issue still persists.

3. Check If Windows Downloaded the Latest Driver

If you have recently installed the new Windows, we recommend checking Windows updates as it can download the device drivers automatically for your graphics card. If it downloads the Graphics driver, restart your computer, and the issue should be resolved.

4. Roll Back to the older Driver

If the current driver is not working properly, we recommend trying Generic or an older driver of your laptop Graphics Card. Follow the below instructions:-

  1. Click Start Menu and type Device Manager

    Launching Device Manager
    Launching Device Manager
  2. Open the device manager and right-click on the current driver
  3. Select Properties and go to the Driver tab
    Go to Driver Properties
    Go to Driver Properties
  4. Click Roll Back Driver and select one reason from the given
    Roll Backing Driver
    Roll Backing Driver
  5. Click Yes to roll back the driver
  6. Once done, check if the brightness is not changing issue persists.

5. R-install Graphics Driver

If the above methods did not fix the issue, it mostly occurs due to the corrupted Graphics driver. You can reinstall the driver by following the below steps:-

5.1 Uninstall Graphics Driver

  1. Right-click the Start Menu, then click Device Manager

    Open Device Manager
    Open Device Manager
  2. Expand the Display Adapter Menu and right-click the current Graphics Driver
  3. Select Uninstall Device, and tick Delete the Driver Software For This Device, then click Uninstall

    Uninstalling Graphics Driver
    Uninstalling Graphics Driver

5.2 Install Graphics Driver

  1. Go to the Graphics Manufacturer’s Website, search for the Graphics Card Driver
  2. Download the driver and wait for the downloading to finish
    Download Latest Graphics Driver
    Download Latest Graphics Driver
  3. Open the installer and follow the instruction
  4. Make sure to check the option Perform Clean Installation
  5. Once done, check if the brightness issue is resolved.

6. Edit Power Plan Options

Power plans control the brightness, display settings, and hardware usage. The power plan has an option called Power Saver, which is used to reduce hardware energy where possible. Therefore, it is worth it to change the brightness by changing the power plan.

Follow the steps:-

  1. Click Start Menu and type Powercfg.cpl

    Navigating to Power Plan Settings
    Navigating to Power Plan Settings
  2. Hit Enter to open the settings in Control Panel
  3. Select Power Saver mode, and your brightness should be set to 0.
    Select Power Saver Mode
    Select Power Saver Mode

7. Enable PnP Monitor or Switch to the Generic Driver

If you have PnP hardware, you won’t need to install a driver as it is not required for PnP hardware. One thing you can do is check if the PnP monitor is enabled or not. If it is, try switching to the generic driver and see if it fixes.

  1. To enable the PnP monitor, right-click the Start Menu and select Device Manager
  2. Expand the Monitors tab, right-click the current monitor driver
  3. Click Enable Device if it is disabled
    Enabling PnP Monitor
    Enabling PnP Monitor
  4. If the issue persists, try updating the PnP driver via the device manager.

8. Use Registry Editor

If you have ATI Graphics Card, the issue may cause due to a bug, which was reported by the majority of users. Although the bug occurs in lower versions of Windows, it is also possible in newer versions. if you have catalyst software, the below method may help:-

It is good to create a registry backup, as you may need this in the future if something goes wrong.

  1. Press the Win + R to launch Run Program
  2. Type Regedit and click OK

    Go to Registry Editor
    Go to Registry Editor
  3. In Registry Editor, navigate to the following path
    HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Control\Class \ {4d36e968-e325-11ce-bfc1-08002be10318} \ 0000
  4. On the right pane, double-click the MD_EnableBrightnesslf2

    Navigating to the Registry File
    Navigating to the Registry File
  5. Change its value data to 0

    Changing Value to 0
    Changing Value to 0
  6. Repeat the same process with KMD_EnableBrightnessInterface2
  7. Now navigate to the following directory
    HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Class \{4d36e968-e325-11ce-bfc1-08002be10318} \ 0001
  8. Again, repeat the above process with MD_EnableBrightnesslf2 and KMD_EnableBrightnessInterface2
  9. Once done, close the registry editor and try to adjust the brightness to see if the issue is fixed.
Kevin Arrows
Kevin is a dynamic and self-motivated information technology professional, with a Thorough knowledge of all facets pertaining to network infrastructure design, implementation and administration. Superior record of delivering simultaneous large-scale mission critical projects on time and under budget.
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Expert Tip

How to Fix Laptop Brightness Won’t Change on Windows?

If the issue is with your Computer or a Laptop you should try using Restoro which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Restoro by clicking the Download button below.

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