Clamshell mode running without power?

Discussion in 'MacBook Pro' started by raymondu999, Apr 2, 2009.

  1. raymondu999 macrumors 65816

    Joined:
    Feb 11, 2008
    #1
    Hi all... I have just recently begun to notice that if I'm not running on AC power, my MBP refuses to do clamshell mode:confused: It just goes to sleep when closed. However, when it's running on AC power, it stays awake. Is this the behavior that it's supposed to exhibit, or am I missing something?
     
  2. nerdish macrumors regular

    Joined:
    Jan 28, 2009
    Location:
    Manchester, UK
    #2
    Thats how it works!

    No AC = it will sleep.
     
  3. Consultant macrumors G5

    Consultant

    Joined:
    Jun 27, 2007
    #3
    You might need new battery.
    Have you calibrated your battery?
     
  4. halfbelgian macrumors member

    halfbelgian

    Joined:
    Jan 31, 2009
    Location:
    Winnipeg, Canada
    #4
    http://support.apple.com/kb/HT3131?viewlocale=en_US

     
  5. kolax macrumors G3

    Joined:
    Mar 20, 2007
    #5
    Use InsomniaX to disable sleep so you can run it with the lid closed.

    I have it set to open at start up, and have the key combo "CTRL ALT =" to enable and disable lid sleep. Really useful, and means you don't have to put your Mac to sleep then wake it for clamshell mode to work.

    It'll solve your problem with the battery anyway.
     

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