MBP not detecting external display

Discussion in 'MacBook Pro' started by bubba87, Jun 24, 2011.

  1. bubba87 macrumors member

    Jan 3, 2009
    Hey everyone.

    So I've got a mini display port/dvi adapter running out of my 2011 MBP, into a DVI/VGA adapter, straight into my dell monitor (http://accessories.euro.dell.com/sn...pl&s=corp&sku=128234&~lt=popup&~ck=ManRelated)

    No matter what I do, I can't get my MBP to detect the screen? The display section in system prefs isn't doing anything, nor is any combination of plugging the monitor in whilst on/off, after a reboot, during a reboot etc.

    Can anyone help?
  2. dagamer34 macrumors 65816


    May 1, 2007
    Houston, TX
    Do you have gfxcardstatus installed with the GPU set to integrated? You need to be using the dedicated GPU to use an external display.
  3. bubba87, Jun 24, 2011
    Last edited by a moderator: Jun 24, 2011

    bubba87 thread starter macrumors member

    Jan 3, 2009
    Just tired that. Tried setting it to 'Discrete' and 'Dynamic', but still nothing

    Does anyone have any ideas?:confused:
  4. 840quadra Moderator


    Staff Member

    Feb 1, 2005
    Twin Cities Minnesota
    You are using too many adapters. The Signal does not transfer correctly with all of the adapters you are using. The DVI Adapter you have connected to your Mini DisplayPort is only sending Digital signal, VGA is analogue.

    You will need to purchase a Mini DisplayPort > VGA Adapter for it to work correctly.

    Good discussion on this topic here;
  5. bubba87 thread starter macrumors member

    Jan 3, 2009
    got a DVI cable hooked upto the display port and things a working fine now.
    Thanks all!

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