My macbook need restart to detect external monitors, any hint?

Discussion in 'MacBook Pro' started by sarah.kho, Aug 12, 2011.

  1. sarah.kho macrumors member

    Joined:
    Sep 22, 2010
    #1
    Hi,

    I have a macbook pro 2010, core i5. I tried it with two external monitors and in both cases it does not detect the monitor unless I restart the laptop with the external monitor cable attached.

    - I tested it with the mini displayport to VGA for the projector
    - I tested it with mini displayport to displayport and the Dell U3011 LCD.

    After the restart, it works fine and both monitors are detected but if I disconnect the LCD from laptop and plug it again, it wont work until I restart it.

    I had mac os 10.6.x and now I upgraded to 10.7 and still the same issue.


    Any comment or help is welcome.

    Thanks.
     
  2. jbg232 macrumors 65816

    jbg232

    Joined:
    Oct 15, 2007
    #2
    Are you starting the computer with the laptop in clamshell mode? That normally doesn't work very well from my experience.
     
  3. maril1111 macrumors 68000

    maril1111

    Joined:
    Mar 14, 2010
    Location:
    Denmark
    #3
    I have the same issue 2/3 times however I use my laptop in clamshell mode, if i leave it open and do the disconnect,and replugging it works.
     

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