MacBook does not return from sleep after opening the lid

Discussion in 'Mac Basics and Help' started by holden57, Jul 25, 2009.

  1. holden57 macrumors member

    Jul 18, 2009
    Hello, I have found this problem, and I don't know how to fix it. Sometimes when I open the lid of my MacBook, it will not return from sleep and all I see is a black screen. I usually have to hold the on button until it turns on at this point. Does anyone know what I can do to fix this?
  2. J the Ninja macrumors 68000

    Jul 14, 2008
    Is this consistent? If it is, trying punching this into the Terminal:

    sudo pmset -a lidwake 1

    If it's an intermittent thing....then I'm stumped.
  3. -tWv- macrumors 68000


    May 11, 2009
    Did you upgrade RAM recently? There have been problems in the past with people upgrading RAM and the macbook has problems with waking up from sleep. This deals with a problem with copying the sleep image from the HD back to the RAM. See this forum for possible solutions.
  4. holden57 thread starter macrumors member

    Jul 18, 2009
    As far as I can tell it's a problem that just comes and goes, it doesn't seem to be consistent at all.

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