MBA 13" i7, dimming itself

Discussion in 'MacBook Air' started by tigres, Jun 26, 2012.

?

Does your 2012 MBA have auto dimming issue?

  1. No, my auto dimming IS working correctly.

    9 vote(s)
    64.3%
  2. Yes, my auto dimming is NOT working correctly at all.

    5 vote(s)
    35.7%
  1. tigres, Jun 26, 2012
    Last edited: Jun 26, 2012

    macrumors 68040

    tigres

    Joined:
    Aug 31, 2007
    Location:
    Land of the Free-Waiting for Term Limits
    #1
    Hey all,

    Without derailing another thread, who is having an issue with their MBA auto dimming itself down to darkness?

    I work on an external monitor all day (no issues here), then at home (not connected to an external monitor) my screen will dim itself to #2 from #7 (in dark room BTW). I crank it up to 7, and about 3 minutes or less, it's back down again- all this happens right before my eyes and actively working. Before I know it, I am squinting before I realize the screen is dark again. Then, I crank up the brightness and it repeats the dimming.

    Now, I know I can uncheck the auto brightness box in Sys pref's, but being my 3rd MBA, I see no reason to justify this, as it should work as on my previous machines. That said, I was always running SL, so it may be an OS X issue as I did set up from TM backup.

    I hate to return this thing; but I am interested if any others are having such issues. The poll is to give me credence on what others are experiencing, or if I have a bad light sensor.:confused:

    Also, should anyone recommend a fix, or test (already did a PRAM and SMC reset) like a bad plist or kext file perhaps... whatever.

    Many thanks for any suggestions.
     
  2. macrumors 65816

    Joined:
    Dec 9, 2011
    #2
    I'm not sure if this is the same thing as you're describing, but if I don't work on my MBA for a little while (e.g., if I'm reading something while I'm writing), the screen dims itself after x minutes (don't know exactly how long, have never timed it), and then eventually goes to sleep. When I don't want that to happen, I use Caffeine. This is the only MBA I've had, so don't have anything to compare it to. It's a 2011.
     
  3. macrumors 65816

    ijen0311

    Joined:
    Jul 4, 2009
    #3
    Same as above.
     
  4. thread starter macrumors 68040

    tigres

    Joined:
    Aug 31, 2007
    Location:
    Land of the Free-Waiting for Term Limits
    #4
    Modified my post for clarity.
    thx
     
  5. macrumors 65816

    Joined:
    Dec 9, 2011
    #5
    OK, I see - I don't use the auto brightness feature so can't, say, sorry.
     
  6. macrumors member

    Joined:
    Oct 10, 2007
    Location:
    Tucson, AZ
    #6
    If you got to System Preferences -> Energy Saver -> And uncheck the
    Automatically reduce brightness before display goes to sleep

    This should fix it?
     
  7. thread starter macrumors 68040

    tigres

    Joined:
    Aug 31, 2007
    Location:
    Land of the Free-Waiting for Term Limits
    #7
    no go.

    bummer, looks like it is a potential hardware issue:(
     
  8. macrumors newbie

    Joined:
    Jun 15, 2012
    #8
    My brand new 13/128/8 gb air does the same thing. I had to turn off the "Automatically adjust brightness" or else it would constantly dim itself to the point I could hardly see. I just assumed it was set up that way to save battery life. And I'm sure there are some people who can see fine when it's dimmed. Unchecking that box completely fixed the issue though.
     

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