New Mac User....Dimming Problems

Discussion in 'MacBook Pro' started by JayKay321, Nov 7, 2008.

  1. JayKay321 macrumors member

    Nov 7, 2008
    Hello All,

    New late '08 MBP user here after going my entire life with a PC. After seeing how seamless everything was, I had to make the switch. I've done my research about all the MBP issues and so far everything seems good except for a couple of the dimming issues.

    #1: After about 2 minutes, my MBP's screen dims if I haven't moved the cursor. And yes, I have "automatically adjust brightness as ambient light changes" checked OFF. My settings for "display sleep" and "computer sleep" are set well AFTER 2 minutes. I have searched this forum and the only official answer seems to be here:

    Is this still the only answer/solution available? With only two days before my 14 day return policy is up, I'd really like to make sure it's not a defect in my computer.

    #2: My keyboard also dims and brightens based on how much light is in the room despite having checked off "automatically adjust brightness...."

    Are these issues bugs in the OS or computer specific issues? Thanks in advance for any help/suggestions.

  2. J the Ninja macrumors 68000

    Jul 14, 2008
    For #1, go to System Preferences > Energy Saver and disable "Automatically reduce display brightness before sleep". You can choose to have this off for AC and on for battery, if you like.

    For #2: Go to System Preferences > Keyboard, and disable automatic backlighting (it's a separate switch from the screen's auto-dim)
  3. duffyanneal macrumors 6502a


    Feb 5, 2008
    In the Energy Saver preference panel uncheck "Automatically reduce the brightness of the display before display sleep".
  4. ninja10 macrumors newbie

    Oct 14, 2008
    Houston, TX
    i have a similar problem with my keyboard. i have the energy saver setting to not to turn off the keyboard. after about 2 mins the keyboard turn off by itself and i have to move my mouse to light it back up. haven't found a solution yet so i will have to call apple when i have time.
  5. sal macrumors 6502

    Oct 13, 2007
    wow, this problem is still around even with the new macbook pro? I figured apple would have fixed this bug by now. anyways, this is how I solved the issue on the previous macbook pro. It's worth a shot.

  6. ryanwarsaw macrumors 68000


    Apr 7, 2007
    Open terminal and copy and paste this into it and hit enter.

    sudo pmset -a halfdim 0

    Thats has solved this problem on every Mac I have owned.

    That solves the screen dimming but not sure about the keyboard.
  7. plinx0r macrumors member

    Jul 11, 2008
  8. JayKay321 thread starter macrumors member

    Nov 7, 2008
    Thanks for all the suggestions! Unchecking "automatically reduce brightness of the display before sleep" did the trick.

    As for #2, it appears that this setting is under "keyboard and mouse." Initially i thought the fluctuating keyboard backlight had to do with the "automatically adjust brightness as ambient light changes" setting, but apparently, completely separate things.

    Glad to have found this forum; it's a great resource for the :apple: noobs. :)
  9. Tex-Twil macrumors 68020


    May 28, 2008
    my screen is also dimming and this is perfectly right when I don't use the notebook so I don't want to deactivate it. The problem is that it dims when I'm watching a movie with VLC cos I don't want it to dim. When I watch a DVD with the DVD player it doesn't dim.


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