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macrumors newbie
Original poster
Nov 15, 2011
When I go to control center and adjust the brightness all the way up, it dims a bit when I remove my thumb from the slider. Auto brightness is not turned on. As a test, even with the brightness all the way up, when I touch the slider bar the display get brighter. Removing my thumb causes it to dim again. The slider does not move. Is this supposed to happen?


macrumors 6502a
Sep 19, 2012
Yup it's been like this for iOS 8. Not sure for what purpose.


macrumors 6502a
Sep 17, 2009
I think what you are describing is a fix to allow the phone to display the "true" brightness when you are in control center. Before it didn't show you a true brightness so you had a hard time adjusting it. When you take your finger off the slider, it does dim down a bit.

But when you exit control center, I think the idea is that it will be what you saw/set in control center.

Yeah, from Anandtech review: Setting brightness from Control Center has also been improved. Bringing up Control Center dims the brightness of the app beneath it. On iOS 7 this meant that it was difficult to gauge how bright your display would actually be during use was when changing brightness from Control Center as the application below was darker than it normally would be. On iOS 8 the dimming effect is removed when changing brightness using the slider in Control Center, eliminating this issue.
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