Wake from sleep problem

Discussion in 'iMac' started by Sebby, May 29, 2016.

  1. Sebby macrumors 6502a

    Joined:
    Dec 20, 2008
    Location:
    London, UK
    #1
    My iMac (21.5-inch, Late 2012) started to do something strange when it wakes from sleep. The screen comes on for about a second, then goes off again. The next wake is then fine. It does this each and every time I wake it from sleep.

    I originally thought it might be something to do with f.lux, as I installed it around the time it started happening. However, removing it didn't make a difference.

    I have tried resetting SMC and NVRAM but that hasn't helped either. I'm running El Capitan if that makes any difference.

    I'm at a bit of a loss, so any help is appreciated!
     
  2. Sebby thread starter macrumors 6502a

    Joined:
    Dec 20, 2008
    Location:
    London, UK
  3. Sebby thread starter macrumors 6502a

    Joined:
    Dec 20, 2008
    Location:
    London, UK
    #3
    Update: Installing the 10.11.5 combo update seems to have sorted the issue.
     
  4. Sebby thread starter macrumors 6502a

    Joined:
    Dec 20, 2008
    Location:
    London, UK
    #4
    The issue reappeared and I would guess it was installing f.lux again that did it. I removed f.lux, installed the combo update again, and all is well. Will monitor things without installing f.lux this time.
     

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