MacBook does not return from sleep after opening the lid

[holden57]

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?

 

[J the Ninja]

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.

 

[-tWv-]

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.

 

[holden57]

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