There are multiple ways in which you can update your drivers. Many Windows 10 users reported that doing this fixed their issues with the brightness not adjusting. Some solutions only work for specific devices, so make sure you’re reading the right section! Update your Display Adapter DriversĪ driver update is the first thing you should do regardless of what device you’re using. We compiled a number of great methods for fixing issues related to the brightness of your computer display. Fixed: can't adjust brightness on Windows 10 However, if Windows 10 doesn’t let you adjust your brightness on a laptop, you should troubleshoot the issue immediately. On a PC, you more than likely have the option to change the brightness on your monitor. The sudden drain of batteries can be traced back to the brightness being too high up. We all know that decreasing the brightness of your display is one of the best ways of saving battery life. While PC users might only find this a small nuisance, laptop users reported serious battery issues. Delete hidden devices under PnP Monitors.Fixed: can't adjust brightness on Windows 10.Can't adjust brightness on Windows 10? Here's how to fix it.In our article, you can learn about various ways of troubleshooting this issue. This can quickly become annoying, especially if you regularly tinker with the setting. However, there is an error in Windows 10 that doesn’t allow you to adjust the brightness of your screen at all. Similarly, at night, you can lower it to allow your eyes to rest. Upping the brightness during the day makes it easier to see what’s on the screen. nothing happened for me! The brightness didn't change! By executing powercfg /q I checked that indeed my new value was stored properly.Adjusting the brightness of our devices has become an easy task we perform every day. setting GUID for brightness - look down for Display Brightness.subgroup GUID for Display - look down for Display.current scheme GUID - it's in the first line.Power Setting GUID: aded5e82-b909-4619-9949-f5d71dac0bcb (Display brightness)Ĭurrent AC Power Setting Index: 0x00000064Ĭurrent DC Power Setting Index: 0x0000000c Power Setting GUID: 3c0bc021-c8a8-4e07-a973-6b14cbcb2b7e (Turn off display after)Ĭurrent AC Power Setting Index: 0x00000258Ĭurrent DC Power Setting Index: 0x0000012c Power Setting GUID: 17aaa29b-8b43-4b94-aafe-35f64daaf1ee (Dim display after)Ĭurrent AC Power Setting Index: 0x0000012cĬurrent DC Power Setting Index: 0x00000078 Power Setting GUID: 6738e2c4-e8a5-4a42-b16a-e040e769756e (Turn off hard disk after)Ĭurrent AC Power Setting Index: 0x00000000Ĭurrent DC Power Setting Index: 0x00000000 Power Setting GUID: 0e796bdb-100d-47d6-a2d5-f7d2daa51f51 (Require a password on wakeup)Ĭurrent AC Power Setting Index: 0x00000001Ĭurrent DC Power Setting Index: 0x00000001 The output looks like this (it will be in your system's language): D:\Users\212579988>powercfg /q This command has format (case insensitive): POWERCFG -SETDCVALUEINDEX value The two commands for setting any power settings are powercfg -SetDcValueIndex and powercfg -SetAcValueIndex, depending if you want to change setting when on batteries or on AC power.
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