My Bad I missed the fact that this model has an Ambient light sensor and was foolishly recommending power saving options   Some previous XPS 13 models had this issue and Dell has a public article  <ADMIN NOTE: Broken link has been removed from this post by Dell> However I am still tying to figure out which utility controls the behaviour in Windows 10  Most probably the graphic Driver.  - Removing it completely and reinstalling it should be the first starting point.  - In setting > System > Display   Is there an option to adjust brightness ??  - In power options do you have see adaptive brightness  [IMAGE]          
Hello, I've recently had an issue where my XPS 13 adjusts its screen automatically. The greys become washed out when there is bright light on the webcam.   I have attached a video that shows this. I wave an object over the camera (see shadow in video) and it blocks the sunlight. When I block the sunlight you can see the new tab and search bar adjust colors (especially apparent in the last second.   This is super, super annoying and I cannot figure out how to turn it off. [URL]
XPS Automatically Adjusts the Screen (NOT BRIGHTNESS)