MBP Brightness Fluctuation

Discussion in 'MacBook Pro' started by Velmonk, Sep 15, 2007.

  1. Velmonk macrumors newbie

    May 12, 2006
    I just got a new 15" MBP and it keeps changing the screen brightness by a couple notches either way on it's own. Anyone have/heard of this problem? Any ideas? Thanks..
  2. Veritas&Equitas macrumors 68000


    Oct 31, 2005
    Twin Cities, MN
    Is it one of the new SR models or an older one? My old 2.16 ghz MBP screen would flicker when it was in the lower brightness levels quite a bit....very annoying
  3. chopstick2000 macrumors newbie

    Aug 7, 2007
    Milwaukee, WI
    it seems to me you have it set for the brightness to automatically change when ambient light changes... this is a stupid setting imo, because it changes randomly even when the actual light doesnt appear to change.. so whatever.

    anyway, to turn this 'feature' off, System Preferences > Display > then uncheck the "Automatically adjust brightness as ambient light changes".
  4. Cybergypsy macrumors 68040


    May 16, 2006
    Central Florida!
    Yep sounds like that:)
  5. theman macrumors 6502a

    Jul 26, 2007
    yeah, especially if you stick your hands over the light sensors. Also, if you have a light behind you, and move your body and block the light or unblock the light from shining on the mbp, it will change the brightness.

    just go to system preferences and change it.


  6. CalBoy macrumors 604


    May 21, 2007
    Yes, this does seem to be what's going on. I disabled this within the first few minutes of getting mine; it drove me crazy.
  7. Velmonk thread starter macrumors newbie

    May 12, 2006

    thanks! what an annoying setting.
    i can't imagine who would want that.
  8. CalBoy macrumors 604


    May 21, 2007
    Its heart is in the right place...it just doesn't work out well. Kind of like you little brother/sister; they mean well, but in the end, all they do is make a mess.
  9. zappastean, Nov 3, 2010
    Last edited: Nov 3, 2010

    zappastean macrumors newbie

    May 27, 2010
    Brightness display button fluctuates in brightness & saturation rhythmically.

    My MBP/160GB is nearly 1 year old now, I have been in Mexico City for 4 days now. I mention this because I've never experienced these goings on & big time crashes ever in the 10 years of my Mac experience whilst traveling & surfing in many countries.
    Don't get me wrong,I love Mexico City, its gorgeous! Still, fact is since arriving very strange things have began to happen!
    Three examples;Day1; Ambient Brightness Blue Display button fluctuates rhythmically in saturation & brightness BUT only when the option "Automatically adjust brightness as ambient light changes" is on.
    I've always had this option on & its never caused me any bother.
    Day 2; my MBP's worst ever crash, after re-booting, the fluctuating screen contrast began... a real roller coaster! There was no change in the surrounding ambient light.
    Lastly; if the said option is turned on, the round blue brightness indicator on the control bar in SystemPrefs/Display, fluctuates in saturation & brightness rhythmically.
    If any1 read all this, thanx 4 "bearing with me"... what do you think is going on? :confused: WHAT TO DO ?
  10. aimbdd macrumors 6502a

    Dec 10, 2008
    East Cost
    Just turn off light sensor. See if that helps.
  11. zappastean macrumors newbie

    May 27, 2010
    Sorted, many thanx

    As said, the screen fluctuations seem to have stopped.
    Thanx for getting in touch & answering aimbdd.
    I dont wanna sound ungrateful but I will, lol.

    Ive been using Macs lets say, too much for over 10 years now,
    so although not being the brightest spark,
    I am at least a little experienced.
    So thats just what I did, turned the light sensor off & the fluctuations stopped.

    I wonder why these things things were never a problem b4 the THE CRASH & Re-Boot?

    Now my keyboard has stopped reacting to low light,
    although the "illuminate keyboard in low light conditions" button is still on, in System Prefs/Keyboard.

    I do go on,
    & on.....
    so, Im off to the AZTEC museum then going to the fun fair near "Papalote" there are some crazy ides there.
    have a good day y'all :D
  12. zappastean macrumors newbie

    May 27, 2010
    MBP Brightness Fluctuations & MUCH MORE !

    I must add...
    I am in a new location, a half decent hotel with WiFi.

    whilst replying to your posts,
    all manner of strange things were going wrong that ive never seen b4,
    this is very worrying!

    as said ive used wifi and MB's in many parts of the world and nothing like this has ever happened!

    there is something defenitley "not right".

    what can i do to protect my MB
    where wld i find the log of how/why THE CRASH happened & whats just been going wrong whilst replying to your posts?

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