iPad mini 4 screen keeps dimming

Discussion in 'iPad' started by boston04and07, Sep 14, 2016.

  1. boston04and07 macrumors 65816

    boston04and07

    Joined:
    May 13, 2008
    #1
    Ever since I updated to iOS 10, I've noticed the screen dimming and then brightening on my iPad mini 4 in a weirdly regular pattern. Before, if I was doing a lot on my iPad and taxing it somehow, I'd often see the screen dim on its own a few notches (without me dimming it myself) but a few minutes later it would always come back. Now, ever since the update, if my screen is at full brightness I'll notice it dim a few notches, then about thirty seconds or so later, dim a few more notches, then thirty seconds or so after that, come back up a few notches, then about thirty seconds after that, finally come back to full brightness. This down-down-up-up pattern repeats constantly and happens when I'm plugged in and when I'm running on battery power. Also, the onscreen brightness adjuster that I get when adjusting brightness with my Apple bluetooth keyboard doesn't display, which I guess means my iPad doesn't somehow think it's being told to do this, but rather is dimming the display on its own. Other than that, my iPad has been working great since the update. If anyone has been seeing this too or has any ideas I'd love to know!
     
  2. MistrSynistr macrumors 6502a

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    May 15, 2014
    #2
    Mine was doing this under full brightness on the treadmill the other day outside, happened two day in a row and I wasn't on iOS 10, but 9.
     
  3. boston04and07 thread starter macrumors 65816

    boston04and07

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    May 13, 2008
    #3
    Huh, that's strange. I wonder if this is intended behavior for some reason?
     
  4. windowpain macrumors 6502a

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    Japan
    #4
    Do you have auto-brightness turned on?
    Normal behavior if you do.
     
  5. boston04and07 thread starter macrumors 65816

    boston04and07

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    May 13, 2008
    #5
    Ah, I should have mentioned that I have auto brightness turned off. And, when the display dims, the brightness slider in control center still displays as being up all the way.
     
  6. MistrSynistr macrumors 6502a

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    May 15, 2014
    #6
    I am fairly certain I turn auto brightness off on my devices as well but I will have to check.
     
  7. boston04and07 thread starter macrumors 65816

    boston04and07

    Joined:
    May 13, 2008
    #7
    I've done some more testing of this, and have confirmed that none of my display settings, like reduce white point or anything like that, are somehow changing on their own when the display dims. When I originally posted, my display was going through this dim-brighten-repeat pattern constantly, but since then, I've noticed it'll stop for a little while before starting the pattern up again. When it is doing the dimming thing, I've also noticed that those are times when my battery life is really bad and the back of the device is getting warmer than it normally gets. I'm not doing anything super out of the ordinary - mostly web browsing and watching some videos and stuff. Maybe some process is running in the background that's overtaxing the system, causing the battery life hit and the dimming of the display, idk. I haven't figured out what that could be, though.
     
  8. windowpain macrumors 6502a

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    Apr 19, 2008
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    Japan
    #8
    Yeah, I am not sure what could be causing it, sometimes if auto-brightness is turned on the screen can dim and brighten quite noticeably which be a little surprising if you weren't expecting it.

    Does it happen if you tape over the light sensor (I think located near the camera)?

    You can check that the sensor is working correctly by shining a flashlight on it (to simulate a bright room) and watching the indicator line move.
     
  9. Newtons Apple Suspended

    Newtons Apple

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    Mar 12, 2014
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    Jacksonville, Florida
    #9
    If your device gets too warm from full brightness and intensive CPU usage it will dim the display by itself until it cools down a bit.
     
  10. boston04and07 thread starter macrumors 65816

    boston04and07

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    May 13, 2008
    #10
    Thanks for confirming this @Newtons Apple. After a few days of using iOS 10, my iPad has been showing this behavior much less frequently, so I was starting to wonder if it was something like that. Hopefully it'll continue to decrease over time.
     
  11. Newtons Apple Suspended

    Newtons Apple

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    Mar 12, 2014
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    Jacksonville, Florida
    #11
    Sometimes the CPU is a little stressed for a while after installing a new iOS. Hope it goes away for you.
     
  12. Rok73 macrumors 65816

    Rok73

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  13. boston04and07 thread starter macrumors 65816

    boston04and07

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    May 13, 2008
    #13
    Excuse me?
     
  14. Rok73 macrumors 65816

    Rok73

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    #14
    You're welcome.
     
  15. boston04and07 thread starter macrumors 65816

    boston04and07

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    May 13, 2008
    #15
    I can only imagine you mean that my initial question was too long for you to comprehend, in which case, I'm sorry you have such trouble with these things! I'll try my best to break future posts into teeny bite sized pieces for you to more easily understand.
     
  16. Ffosse macrumors 6502a

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    Nov 5, 2012
    #16
    It's basic English. Use paragraphs when they need to be used instead of veering off into something which could be more readily understood in a new one. You should use some semi-colons too.

    Big blocks of text aren't nice to look at, either
     
  17. Rok73 macrumors 65816

    Rok73

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