Screen goes dim until touched after sleep

Discussion in 'iPad' started by Crosbie, Apr 30, 2011.

  1. Crosbie, Apr 30, 2011
    Last edited: Apr 30, 2011

    Crosbie macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #1
    Anyone have this little issue?

    If the iPad has slept for a while, and I open up the smart cover, it will sometimes come to life with a dimmed screen. As soon as I touch it, normal brightness is resumed.

    I can't consistently recreate this - I think it has to have been asleep for a while, and I think it only happens with the smart cover.

    I'd welcome any solution. It's a distraction for a fraction of a second, so not something I'll be storming to the genius bar about - but I'm intrigued to know whether it's only me.
     
  2. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #2
    Only me then?

    Update: just happened again. It wakes bright, then dims until touched. Wh?
     
  3. ftaok macrumors 603

    ftaok

    Joined:
    Jan 23, 2002
    Location:
    East Coast
    #3
    i think that's normal. i notice that with our ipad2.
     
  4. steve10172 macrumors regular

    Joined:
    Apr 13, 2009
    Location:
    London UK
    #4
    This has something to do with the Smart Cover.
    Sometimes it can get dislodged accidentally, so the display does't come on full brightness and goes to sleep again.
    I think its normal behaviour.
    Anyone think otherwise?
     
  5. steve10172 macrumors regular

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    Apr 13, 2009
    Location:
    London UK
    #5
    Nice pics.
     
  6. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #6
    'Normal' - meaning it happens to everyone?

    It's odd, though, don't you think? I can't see a rationale for dimming the screen in this way until touched. Seems like a bug of some sort to me.

    It's not a biggie but it's not expected behaviour.

    (Thanks for responses, btw. :))
     
  7. MultiMediaWill macrumors 68000

    Joined:
    Aug 1, 2010
    Location:
    Minneapolis
    #7
    It happens to me once in a while too. I don't know why though.
     
  8. LiloThePleo macrumors 6502

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    Aug 8, 2010
  9. c14nhl macrumors 6502

    c14nhl

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    Location:
    Edinburgh
    #9
    Happens to me, but have never thought of it as an issue.
     
  10. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #10
    It's no biggie, but to me it's more of an issue than, say, the backlight bleed that you only notice when looking at a black screen on full brightness in the pitch dark - because I actually notice this in day to day use, and it distracts me into taking an action: touching the screen to brighten it (with the thought that maybe I need to go into the multitasking tray to fix the brightness setting...).
     
  11. mareyeka macrumors newbie

    Joined:
    Apr 20, 2011
    #11
    happens here

    I received my iPad last Monday. I noticed the dimming too. Doesn't bother me though.
     
  12. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #12
    Anyone able to reproduce this consistently, or got a guess what might cause it?
     
  13. KHC831 macrumors member

    Joined:
    Mar 15, 2011
    #13
    just turn off auto-brightness and the problem will go away
     
  14. yegon macrumors 68020

    Joined:
    Oct 20, 2007
    #14
    Done this a couple of times to me. Unrelated to auto-brightness I think as it was the first thing I disabled when I got my iPad.
     
  15. ben12 macrumors newbie

    Joined:
    Mar 24, 2011
    #15
    I was having this same problem until I turned off auto-brightness.
     
  16. thaialism macrumors member

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    Mar 21, 2011
    Location:
    san diego
    #16
    since you said that it's not consistent, i think it has a lot to do with the amount of light in the room, and a slow "light" sensor on the ipad2, same on the iphone, sometimes it just takes a while for the ios to change brightness (a lag so to speak)?

    oh yea, next time you notice it being dim, don't do anything to it, see if it'll get brighter on it's own.
     
  17. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #17
    That's a good idea. Will test.

    I also want to try and figure whether this only happens on the home screen. Anyone?

    It's not just the light sensor behaving normally; I do sometimes notice that happening, and it's not the same behaviour. For instance, this responds to a touch in the same way that, say, a MacBook might brighten up when the touchpad is operated when it's dimming ready to sleep.
     
  18. RobT macrumors 6502a

    RobT

    Joined:
    Dec 20, 2007
    Location:
    Ohio, USA
    #18
    This happens to me a lot. Just about every time I open the smart cover on my iPad 2 the iPad turns on then immediately dims. Just turned off auto brightness to see if that resolves it.
     
  19. phluid13 macrumors member

    phluid13

    Joined:
    Dec 19, 2007
    #19
    This happens because as soon as you peel back the first part of the smart cover, the light sensor is still covered. This makes the iPad think it is in a dark situation until you peel back the entire smart cover and the sensor finally sees how bright the room is.
     
  20. Mlrollin91 macrumors G4

    Mlrollin91

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    Nov 20, 2008
    Location:
    Ventura County
    #20
    Happens to me as well. Not every single time I open up the smart cover, but several times a day. Doesn't really bother me though.
     
  21. Crosbie thread starter macrumors 6502a

    Crosbie

    Joined:
    May 26, 2010
    Location:
    Brighton, UK
    #21
    If this is the case, and it's at least reasonable speculation, then it's a bug Apple should address.

    Does auto brightness work by polling the sensor at fixed intervals? That might explain the erratic behaviour; sometimes you open it at polling time, sometimes you don't...
     
  22. Dlanod macrumors 6502a

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    Jul 11, 2008
    Location:
    UK
    #22
    I'm using a Piel Frama case with sleep function and it does the same. Not bothered personally.
     
  23. Capt T macrumors 6502a

    Joined:
    Mar 20, 2010
    #23
    Here is a theory for you.

    I noticed last night if I rolled the case open, so I would put it into the stand position that it would do this. It may be that the light sensor took the read from the case blocking any room lighting and then once you touched it the light sensor took another reading.

    It seems if I open the cover quickly or the room is very bright it just brightens up.

    Just a thought to check out as you are trying to replicate it.
     
  24. djon41 macrumors regular

    Joined:
    Jan 7, 2007
    #24
    I've noticed this issue as well, and the above quote is essentially what I've been chalking it up to. I think the ambient light sensor takes a reading before the cover is completely out of the way, even when you're swinging it open like a book, and takes a few seconds to re-read and adjust accordingly.
     
  25. Coukos34, May 7, 2011
    Last edited: May 7, 2011

    Coukos34 macrumors 6502

    Joined:
    Mar 20, 2009
    #25
    This is exactly the reason. You can tell too, by quickly removing the cover, it won't be dim (as opposed to peeling at a more normal speed). It has to do with the light sensor being in the middle of the ipad, and still being half covered when you start to peel back the smart cover. I dont think it is really a "bug" that apple can fix. It has to do with the placement of the sensor, and where the smart cover folds. The only thing Apple could do would be to delay the sensor from making an adjustment, and that would make people using it without a smartcover complain that the light sensor is slow to respond to ambient light. They are kind of stuck with it at this point. I don't know, it doesn't really bother me that much anyways...
     

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