13" MBP - Screen brightness waxing and waning?

Discussion in 'MacBook Pro' started by Skydiver32, Jun 13, 2009.

  1. Skydiver32 macrumors member

    Joined:
    May 15, 2009
    #1
    I just got a new MBP:D , but while using a very simple program - Java based Question bank - ie nothing moving, no graphics, just text -- the brightness of the screen goes down for a few seconds and then lightens up again a few minutes goes by and down ... (like a wave).

    The computer is plugged in and a CPU usage monitors (istat) shows a simultaneous spikes with the darkening of the screen.

    This is very distracting. What is it, and how do I stop it??

    Thanks
     
  2. nws0291 macrumors 6502

    Joined:
    Apr 24, 2006
    #2
    Did you turn off the ambient light sensor? Go to sys prefs --> Display --> uncheck automatically adjust.
     
  3. AmpCoder macrumors 6502

    Joined:
    Mar 27, 2007
    #3
    That is the automatic brightness feature of the screen changing the brightness based on the ambient lighting around your notebook. You can turn off this feature by un-checking the box that says "Automatically adjust brightness as ambient light changes" in the Displays dialog box of the System Preferences.
     
  4. Skydiver32 thread starter macrumors member

    Joined:
    May 15, 2009
    #4
    Thanks for the very quick response.
    I just unchecked it, so lets see what happens .....
    Back to my sad life of questions:(
     

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