Using MacBook Pro (lid closed) with Cinema Display

Discussion in 'MacBook Pro' started by marvel2, Apr 28, 2008.

  1. marvel2 macrumors 6502

    Jun 27, 2007
    I am trying use my macbook pro with its lid closed while connected to my 23" cinema display. However, when I wake up the system with a mouse, the cinema display will wake up (without the menu bar and dock) but after a few seconds, go right back to sleep. What is the problem?
  2. e12a macrumors 68000


    Oct 28, 2006
    I believe it is a bug with some Macbook Pro systems. Have you run all the EFI updates?
  3. marvel2 thread starter macrumors 6502

    Jun 27, 2007
    It is good to know that I am not the only one with this problem. I just found a new EFI firmware 1.5.1, I will apply it and see if it fixes it.


    The new EFI firmware fixed it. thanks

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