Auto brightness doesn't go below a certain level

Discussion in 'MacBook Pro' started by MacMan988, Jul 12, 2013.

  1. MacMan988 macrumors 6502a

    Joined:
    Jul 7, 2012
    #1
    Hi, I have a late 2011 macbook pro with mountain lion installed. Auto brightness has been working well for me since I bought the mac. But today I re-installed mountain lion and now the auto brightness seems to be not going below a certain point somewhere a little below the middle in the brightness adjuster in the system preferences. But it suddenly climbs if I bring a bright light near it.

    At the moment I my room is completely dark with all the lights off but still it doesn't fall below the mid-range.


    Any ideas?
     
  2. Interstella5555 macrumors 603

    Interstella5555

    Joined:
    Jun 30, 2008
  3. MacMan988 thread starter macrumors 6502a

    Joined:
    Jul 7, 2012
    #3
    No, I'm not using any covers.
     
  4. JennyC macrumors newbie

    Joined:
    Jul 11, 2013
    #4
    Since you're not getting very many posts (I hope more knowledgeable people chime in!), I did what I could and tried to research your problem. These are my findings:
    Auto brightness is not working on MacBook Pro OS X Lion https://discussions.apple.com/thread/3221901?start=15&tstart=0

    It's mentioned to try a PRAM reset, so here's how to do that
    How do I reset the PRAM of my MacBook Pro in OSX Mountain Lion? https://discussions.apple.com/thread/4228204?start=0&tstart=0
    OS X Mountain Lion: Reset your computer’s PRAM http://support.apple.com/kb/PH11243


    Good luck!
     
  5. MacMan988 thread starter macrumors 6502a

    Joined:
    Jul 7, 2012
    #5
    Thanks for the information.
     

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