Cannot adjust the brightness after installing Windows 10

Hello. I have a Dell XPS 15 L521X.   Recently updated to Windows 10 and I can adjust is no longer my brightness upwards or downwards.

Now the screen is quite low.  I'd say about 30-40% brightness.  10 widows I found about 5 different places to adjust your brightness and I made sure all of them have been set to 100%.  I have my power plan to high performance and I went into advanced settings and turned off Adaptive brightness and made sure that the brightness of the screen the two Dim brightness set to 100% on battery & are plugged.  Rebooted and still dim.

My question is, on Dell laptops, Windows has full access to the brightness control?  Or Dell replaces Windows with their software customized for the display settings?   When I bought this laptop in 2012, the software, at the time, was called Dell QuickSet.  What is the responsible application of brightness of the screen control?  And is it necessary?

Thank you



I am also having this same problem. My brightness has been set at max after update and it hurts my eyes. I did it... Control Panel > Device Manager > graphics cards > Intel HD Graphics 4000 > pilot > Update Driver > Browse my computer > let me pick. Choose Microsoft Basic graphics card.

After doing this, my problem was solved, and I was able to adjust the brightness of my screen again. BUT if you play games on your laptop, it will cause display problems in your game.

Tags: Dell Software

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