External display only MPB lid open

Discussion in 'OS X Mountain Lion (10.8)' started by zz2k9, Aug 7, 2012.

  1. macrumors newbie

    Joined:
    Jul 15, 2012
    #1
    It worked in lion, you would activate a hot corner for display sleep, wait a few seconds, open lid and only the External would be active, MPB display off however i could still use the webcam and keyboard etc. In 10.8 I cant do this anymore. I want the gpu to power only the external.
    Any ideas?

    Thanks

    zz

    also i just tried this terminal hack, sudo nvram boot-args="iog=0x0"
    and it seems to work.
     

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