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.

Since Monday, I've been unable to adjust the brightness on my laptop screen via the F2 and F3 buttons - the correct brightness slider appears visually on screen but pressing the buttons no longer makes the slider move up or down. I can move it via my mouse cursor, by clicking and dragging but if I do that, the actual brightness of my screen doesn't change at all.

Its an HP Pavilion 15-p249sa. I've looked up the issue elsewhere online and read a number of potential fixes which haven't worked, including adjusting the brightness via 'brightness' within the 'settings' section of the charm bar (I think thats what its called?). I've tried adjusting the power plan, enabling adaptive brightness via the power settings as mentioned by someone else with the same issue on a Microsoft support forum but that didn't fix it. I'm at the stage where it seems other people are told to uninstall drivers relating to the graphics card/graphics and I'm cautious about trying that, as I wouldn't want the screen to go blank before any replacement were to be installed. I'm not greatly confident with hardware changes but I wondered if there are any somewhat easy/easy-ish potential fixes I could at all try?.

Oh and also I checked for Windows updates installed. I couldn't remember noticing a recent update, say in the last few days which could have directly triggered the loss of the brightness function but it was suggested I look up the last updates just in case, so I did and it says 9 updates failed to install on January 9th and before then, the last successful update was a cumulative security update successfully installed on December 20th.

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.

I've noticed that after the March update, tapping on the brightness slider in the notification bar to change the brighness would sometimes cause my phone to go to the network settings. It would exacerbate when the phone is in landscape mode.

I also have seen forums explaining how to manually edit /sys/class/backlight files to change the brightness, but I don't have any further directories to find that file from. The /sys/class/backlight folder doesn't have any file or subsequent folders inside.

Then boot the system. You shall find some content under sys/class/backlight/ folder now. Now edit /sys/class/backlight/intel_backlight/brightness to change brightness. You may also try one grub option at a time.

If this solves the problem update grub options and regenerate grub configuration to make the change permanent. Once the backlight is detected by Operating system the slider option shall reappear (I am not sure).

Please can you add a slider for camera brightness adjustment as I can hardly see anything when checking print remotely especially when printing black, I am sure it would be easy to add a software gain adjustment to the camera menu,

Thank you all t bambu labs you are all

Camera brightness/contrast should be user-adjustable. At the very least, there should be a button for the user to manually trigger an auto-adjust. The current system where it auto-adjusts on startup and is then set in stone until the printer is power-cycled is absurdly limiting.

I have a few devices communicating with my HA via MQTT. One of these devices are Smart Bulbs that show up on a card with a dimming slider to allow me to adjust their brightness level, another is a dimmer switch that only allows me to turn_on / turn_off the lights.

On my Series X the game is too bright even with brightness at 0. This means that there is too much fake light in the game and day races look flat while night races are too bright. There is also too much light on the car, making it look like a toy or something.

Independet from environmental lightning conditiones after a random operating time (0-30 minutes) the display will dimm down to approx. 30-50% brigthness. Too less, to read comfortabely or see what e.g. car-navigation at a sunny day shows. After an additional random time (minutes, houres) suddenly the brightness will return to full brightness. I could not find any correlation to a specific app or operating mode. Seems to be compleley random when and how long the display will become dimmed down.

Random brightness changes: Just for the record, I got some too yesterday. I was reading something on the phone in a not very brightly lit room, without moving (nothing to change the amount of light the brightness sensor receives), and yet, all of a sudden, it got brighter. Then, a couple seconds later, it dimmed back to the previous level.

I moved the phone a little to see if I could trigger it again, to no avail. Go figure.

I was reading something on the phone in a not very brightly lit room, without moving (nothing to change the amount of light the brightness sensor receives), and yet, all of a sudden, it got brighter. Then, a couple seconds later, it dimmed back to the previous level.

The System Table reports screen_brightness is 255 when the brightness is correct. It also reports that value when it is incorrect. The slider, I expect, is operating correctly since manually modifying the Table does not actually change the brightness of the display.

I have Win 11 and keep it and drivers updated. Recently I noticed having sore eyes and the monitor looked brighter than usual. I looked for the brightness slider in Windows. It was gone. What's that all about? The only brightness control I have now is on the monitor itself.

I recalibrated the monitor and sure enough, it was much brighter than before. I wonder how many images I processed like this.

Has anyone else noticed this?

However, I think in W11 the brightness slider has gone from Display Settings and moved to the Network settings icon. Click the network icon bottom-right of the screen, and the brightness slider is there.

On W10, you can also get it from the action centre, bottom right. That doesn't exist in the same form in W11, and they've put some of the same stuff behind the network icon. So the network icon now has stuff like focus assist, flight mode, accessibility and screen brightness. What you don't get in W11 when you click the network icon is, er, network stuff. You have to double-click it to get that. be457b7860

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