Corrupted Monitor DriversĪnother possible reason to create the brightness slider not working on Windows 11 laptops or tablets is a corrupted driver for your monitor. Third-party applications such as TeamViewer and Malware detected software conflict with the monitor driver and created this issue. ![]() ![]() Third-party applications are one of the major reasons for missing or not working the brightness slider on Windows 11 laptops or tablets. ![]() Here are the possible reason for missing the brightness slider on Windows 11: 1. I will try to find out the possible reasons for this issue, and now, I will discuss these issues.Ĭheck out our expert-recommended guide on how to Enable Telnet On Windows 11. There are some possible reasons to face the slider for brightness not working in Windows 11. In these circumstances, users are annoyed and frustrated when they need to control the brightness of their laptop or tablet devices. In Windows 11, users suddenly face the brightness slider is grayed out, which means the brightness slider is not working or disabled. Also, modifying or changing the Windows Registry value or Group Policy settings occurs the brightness slider missing issue. The brightness slider is missing on Windows 11 because of third-party applications, a corrupted or outdated monitor driver, or the monitor driver may be outdated or disabled on your device. Why Is Brightness Slider Not Working in Windows 11? How to Fix Brightness Slider Missing in Windows 11?.Why Is Brightness Slider Not Working in Windows 11?.Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions. In Device Manager, select Display adapters, then select the display adapter. In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results. If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. To find the brightness slider in earlier versions of Windows 10, select Settings > System > Display, and then move the Change brightness slider to adjust the brightness. The Brightness slider appears in action center in Windows 10, version 1903. To change the brightness on an external monitor, use the buttons on it. You might not see the Change brightness for the built-in display slider on desktop PCs that have an external monitor. Even if you use it, you can still move the Change brightness for the built-in display slider to fine-tune the brightness level. This automatic setting helps make sure your screen is readable wherever you go. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. To find out if your PC supports this, select Settings > System > Display. Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. (If the slider isn't there, see the Notes section below.) Select action center on the right side of the taskbar, and then move the Brightness slider to adjust the brightness. For more info, see Adaptive brightness and contrast in Windows. Some Windows PCs can automatically adjust the screen brightness and contrast based on content that’s displayed on your built-in screen. You might also see another check box displayed: Help improve battery by optimizing the content shown and brightness. Even if you use it, you can still move the Brightness slider to fine-tune the brightness level for a built-in display. Select Brightness, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. To find out if your PC supports this, select Settings > System > Display. (If the slider isn't there, see the Notes section below.) ![]() Select the Network icon on the right side of the taskbar, and then move the Brightness slider to adjust the brightness.
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