Fix Can’t adjust screen brightness in Windows 10

Fix Can’t adjust screen brightness in Windows 10: If you have recently upgraded to Windows 10 then you may be facing this annoying issue where you can’t adjust the screen brightness, in short, screen brightness settings stopped working. If you try to adjust the brightness using Windows Settings apps, you won’t be able to change anything, as dragging the brightness level up or down will do nothing. Now if you try to adjust brightness using the brightness keys on the keyword then it would display the brightness level going up and down, but nothing would actually happen.

Why I am unable to adjust screen brightness on Windows 10?

If you have enabled automatic battery management then if the battery starts to become low the brightness will be automatically changed to dim settings. And you won’t be able to adjust the brightness again until you will change the battery management settings or charge your laptop. But the issue can be a number of different things for example corrupted drivers, incorrect battery configuration, ATI bug等等。

This is quite a common issue which a lot of Windows 10 users are facing right now. This issue can also be caused because of the corrupt or incompatible display driver and thankfully this issue can be easily resolved. So without wasting any more time let’s see how to actually fix can’t adjust screen brightness in Windows 10 with the help of below-listed steps.

Fix Can’t Adjust Screen Brightness in Windows 10

确保创建一个还原点，以防出现问题。

方法 1：更新显示适配器驱动程序

1. 按 Windows 键 + R，然后输入 输入devmgmt.msc 然后按Enter打开 装置经理。

2. 展开 显示适配器 and then right-click on the integrated graphics card and select 更新驱动程序

请注意： The integrated graphics card would be something like 英特尔高清显卡4000。

3。 然后点击 自动搜索更新的驱动程序软件 and let it install the driver automatically.

请注意： Make sure you have a good internet connection in order for Windows to automatically download the latest drivers.

4. Reboot your PC and see if the issue is resolved or not.

5. If not then again select 更新驱动程序 and this time click on 浏览我的电脑以获取驱动软件。

6。 接下来，单击 让我从计算机上的可用驱动程序列表中选择 底部的选项。

7。 现在 勾选 “显示兼容硬件” then from the list select Microsoft基本显示适配器 并点击 下一步。

8. Let it install the basic Microsoft display driver and reboot your PC to save changes.

Method 2: Adjust the brightness from Graphics Settings

1. Right-click in an empty area on the desktop then select 英特尔图形设置。

2。 现在点击 屏 显： from the Intel HD Graphics Control Panel.

3. 从左侧菜单中选择 Color Settings.

4. Adjust the Brightness slider according to your liking and once done, click 应用。

方法3： Adjust screen brightness using Power Options

1.右键单击 电源图标 在任务栏上选择 电源选项。

2.现在点击 更改计划设置 next to currently active power plan.

3。 点击 更改高级电源设置 在底部。

4. From the Advanced settings window, find and expand 显示。

5. Now locate and click each of the following to expand their respective settings:

显示屏亮度
Dimmed display brightness
启用自适应亮度

5. Change each of these to the settings you wish, but make sure “启用自适应亮度”是 关闭。 

6. Once done, click Apply followed by OK.

7. 重新启动电脑以保存更改。

方法 4：启用通用 PnP 监视器

1. 按 Windows 键 + R，然后输入 输入devmgmt.msc 并按 Enter 键打开设备管理器。

2. 展开 显示器 然后右键单击 通用PnP监视器 并选择 启用。

3. 重新启动您的电脑以保存更改并查看是否能够 fix can’t adjust screen brightness in Windows 10 issue.

方法 5：更新通用 PnP 监视器驱动程序

1. 按 Windows 键 + R，然后输入 输入devmgmt.msc 并按Enter键。

2. 展开 显示器 然后右键单击 通用PnP监视器 并选择 更新驱动程序

3。 选择 浏览我的电脑以获取驱动软件。

4。 接下来，单击 让我从计算机上的可用驱动程序列表中选择 底部的选项。

5. 现在选择 通用PnP监视器 并点击下一步。

6. 重新启动您的电脑以保存更改并查看是否能够 fix unable to adjust screen brightness on Windows 10 issue.

方法一：更新显卡驱动

If the Nvidia Graphics drivers are corrupted, outdated or incompatible then you won’t be able to adjust screen brightness in Windows 10. When you update Windows or install a third-party app then it can corrupt the video drivers of your system. In order to resolve this issue, you need to update your graphics card drivers in order to fix the underlying cause. If you face any such issues then you can easily update graphics card drivers with the help of this guide.

Method 7: Delete hidden devices under PnP Monitors

1. 按 Windows 键 + R，然后输入 输入devmgmt.msc 并按Enter键。

2. Now from Device Manager menu click 查看 > 显示隐藏的设备。

3. Right-click on each of the hidden devices listed under 显示器 并选择 卸载 设备。

4. 重新启动您的电脑以保存更改并查看是否能够 adjust screen brightness in Windows 10.

方法8：注册表修复

请注意： This method is only for users who have ATI graphics card and have Catalyst installed.

1. 按 Windows 键 + R，然后输入 注册表编辑器 并按 Enter 打开注册表编辑器。

2. 导航到以下注册表项：

HKEY_LOCAL_MACHINE  SYSTEM  ControlSet001  ControlClass  {4d36e968-e325-11ce-bfc1-08002be10318}  0000

3. Now double-click on the following Registry keys and set their value to 0 then click OK:

MD_EnableBrightnesslf2
KMD_EnableBrightnessInterface2

4. Next, navigate to the following key:

HKEY_LOCAL_MACHINE  SYSTEM  CurrentControlSet  Control  Class {4d36e968-e325-11ce-bfc1-08002be10318}  0001

5. Again double-click on MD_EnableBrightnesslf2 and KMD_EnableBrightnessInterface2 then set their value’s to 0.

6. Close everything and restart your PC to save changes.

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我希望上述步骤对您有所帮助，并且您能够 fix Can’t Adjust Screen Brightness in Windows 10 but if you still have any questions regarding this post feel free to ask them in the comment section.