Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this, select Settings > System > Display. Under Brightness and color, look for the Change brightness automatically when lighting changes check box, and then select it to use this feature. This automatic setting helps make sure your screen is readable wherever you go. Even if you use it, you can still move the Change brightness for the built-in display slider to fine-tune the brightness level.

The Brightness slider appears in action center in Windows 10, version 1903. 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.


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If you don't have a desktop PC and the slider doesn't appear or work, try updating the display driver. In the search box on the taskbar, type Device Manager, and then select Device Manager from the list of results. In Device Manager, select Display adapters, then select the display adapter. Press and hold (or right-click) the display adapter name, then select Update driver and follow the instructions.

This app adds a new icon into your system tray, where you can click to have instant access to the brightness levels of all compatible monitors. These brightness sliders can adjust one or all displays at once.

If it is a laptop, it will most likely come back if you reinstall manufacturer's management tools software. The are usually full of unwanted stuff, but if you uninstall them, those on screen goodies like screen brightness indicator will go away too.

I have a windows 10 laptop more than 5 years old. I have been with full brightness for a month or so on the laptop panel. The brightness control disappeared from everywhere (Activity panel, power plan options, screen configuration...) after an S.O. update. I didn't mind too much because I work at a very well lit room and brightness was almost full anyway. What bothers me is that the "night display" function stopped working on the laptop panel, but was still working on the addition monitor, so after dark I work with two monitors at different brightness levels.

The way to restore the brightness control was through the Device Manager. There I saw both monitors (Generic PnP monitor) as "disabled". I enabled both of them and the brightness control reappeared in all the right places.

To open the slider, you can click on the icon in the system tray area. The app will detect your screen or monitor automatically, and it will also detect several screens at the same time if you have multiple screens connected at once.

To further this, you might have an option in your GPU driver utility to adjust brightness via software. But as @Mel0n. mentioned, Windows otherwise won't have any controls for an external display. That, of course, is still assuming we're all talking about a desktop, and not a laptop.

I'm using Ubuntu Trusty tahr and I've noticed that there is no brightness control (like a slider), In windows I'll use Intel's graphics media accelerator to reduce brightness but here it looks impossible.

Multiply the gamma values on the crtc currently attached to the output to specified floating value. Useful for overly bright or overly dim outputs. However, this is a software only modification, if your hardware has support to actually change the brightness, you will probably prefer to use xbacklight.

This answer relies on the dbus interface, which alters the actual brightness setting, represented by a file in /sys/class/backlight's sub-folder. Thus , through using dbus we actually control the hardware.

I just upgraded my Mid-2009 15-inch Macbook Pro from Windows 7 to Windows 10 and the Bootcamp drivers for controlling the brightness no longer work. I tried reinstalling Bootcamp but because Apple doesn't officially support anything higher than Windows 7 on my computer I cannot reinstall it. I tried installing individual drivers such as the keyboard and NVIDIA but nothing has fixed the issue. Other keyboard shortcuts (ie volume, keyboard brightness) still work. I am not even able to change the brightness using the brightness slider in the Bootcamp menu in the taskbar (it will still slide and I can Apply changes, but it doesn't actually make any changes). The only thing I've found that works is to open the NVIDIA icon in the taskbar and choose to modify brightness with that directly, which is very inconvenient considering I can no longer adjust brightness using the F1 and F2 keys. I've read a lot of other posts but none of the solutions I've found worked (mostly all say reinstall bootcamp drivers). Does anyone know how to make it so the brightness controls on the keyboard work again? Thanks for any input.

You can't, because your Mac does not support Boot Camp 6, and it provides the drivers needed to manage brightness and volume through the keyboard (these ones can only be installed through the official Boot Camp installer, not installing the drivers individually).

No, ALL of the keyboard shortcuts WORK with the exception of the brightness control (which doesn't even work manually adjusting in the Bootcamp app). Bootcamp is still installed, it is just that the brightness control stopped working with the upgrade and I cannot reinstall. Undoing everything and using a virtual machine is NOT a solution for me - I would sell my MacBook and buy a Windows only machine before that (I stopped using the OS X side awhile ago because everytime they update it seems the only point is to add integration with IOS devices (which I don't have) and it results in my computer slowing down.) A native experience is by far better than any emulation, even with it being slowed artificially by Apple because they forced Windows to install on an emulated BIOS for my particular model.

As the above from previous posts indicate, I know that Bootcamp is not supported: I am looking for alternate options. Right now I am still using the NVIDIA controls and I calibrated my screen using the NVIDIA controls for brightness and contrast during the process. This is still a clunky bandaid instead of a good fix, but it makes the computer usable. Please if anyone knows something else that works, post here.

The software at the link below, Dimmer, can used to dim the screen further than I can with the NVIDIA controls. It is also very simple and stays in the taskbar (so it is not a pain to quickly change brightness settings). It is also free, the developer just requests donations.

The "Microsoft Basic Display Adapter" solution worked, but hardware acceleration features were gone. I followed -unchangeable-in-windows-8-on-a-macbook-wi th-nvidia/, I switched back to an nVidia driver and added the registry entry "EnableBrightnessControl" set to 1, as decribed in the page. Now I have brightness control and a real nVidia driver.

Hey, it's me again, the guy stupidly trying to install Windows 7 on a machine for which HP only offers Windows 10 drivers. When last we left our hero, he had gotten rid of all the yellow exclamation marks in Device Manager. Good news, but now the brightness function keys on the laptop are nonfunctional (predictably). No settings in display options or the control panel can change this setting. I think this is because Windows is using a "Generic PnP" monitor driver which technically works but provides no display options. (The usual locations one would find brightness controls on Windows 7 (such as "power options") are similarly devoid of settings. Am I correct that the Generic PnP monitor driver is to blame?

1) Fn + F2/F3 doesn't change the brightness at all. Matter of fact, the slider is stuck and can only move one level up and down, all without changing the brightness. I can change the brightness on the right bottom panel and all the other function keys are working fine, but just the brightness function key is not working.

I believe all these started happening after the windows update. I tried updating the display adapter drivers as well as dis- and enabling the PnP monitor driver, but nothing solved the problems. I haven't tried to do anything regarding the registry or something with command prompt as I am not well informed with these.

My Dell XPS15 is now experiencing this issue. All "in Windows" brightness controls are non-functioning. I can however adjust brightness of display in BIOS (only). dell's answer is reinstall WIndows 11 which is nonsense and major PITA, I need a software update/repair solution quickly please.

I'm having the bright slider issue after the update too, but not the display bug. I'm using an Acer Nitro 5. My main energy plan is bugged with permanent low bright and the others are auto sliding when I try to adjust via keyboard.

The correct brightness is crucial for proper viewing when working on a PC. Without it, you face problems while watching a movie, playing a game, working on a PC, etc. Below we will explain how to fix the brightness slider missing on Windows 10 and 11.

The mysterious disappearance of the brightness slider surprises many users. For some, it is greyed out, or perhaps the icon is missing. So, why does this happen? A possible explanation is that the option is disabled. To fix it, follow these steps:

The Teamviewer handles drivers for your monitor, which could cause the brightness slider missing. If you encounter the error with Teamviewer installed on the PC, you should uninstall it to fix the issue.

Adjusting the display settings on a new computer is easy to do. It's important to know how to adjust the brightness on Windows 10 and Windows 11 because if you get eye strain or headaches, the display brightness could be the culprit. Fortunately, you can adjust the levels manually or automatically based on parameters like battery life or the surrounding light.

If the slider is unavailable, it will be due to one of two things. If you're using an external monitor, use the buttons on that to change the brightness. Otherwise, you need to update the display driver. e24fc04721

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