Hi there!
I have the strong feeling that the (amount of) memory might be the problem.
Please tell me if you see any similarities or differences in your setup.
1) Problem description
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Does not always wake up from sleep. In about 30% of all tries the screen goes on, but only shows black. The optical drive does not generate noise as it does before correct sleep resumes. The only help is resetting the computer by pressing the power button several seconds. The problem cannot be cured by removing iStat Pro, resetting battery components, switching sleep mode or doing other voodoo described in this thread. I see no relation in terms of "time spent in sleep mode", temperature, programs running, time of day, ...
2) Hardware
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Most recent Macbook (introduced a few weeks ago) with 45nm processor. This series is capable of using 4 GByte of memory (one can configure that much in the Apple store), whereas some older Macbooks only can use about 3,2 GByte when inserting 4 GByte.
3) Memory
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No problem (so far) with 2x 512 MByte I got from Apple.
No problem (so far) with 1x 2048 MByte (details below).
Problem as described above with 2x 2048 MByte (details below).
The 2048 MByte memory is Corsair Valueselect PC5300, CL5, "256 x 64". I count 8 chips on each side.
Please tell me what kind of memory modules you use. Perhaps the number of chips, doublesidedness or something alike causes the problem.
PS: Please excuse me to post here although I only have a Macbook. I guess the problem is caused by the same thing in both Macbook and Macbook Pro.
Thanks,
Carsten
what year is your macbook?
as most people here have macbook pros within in the last 2 years im guessing. ours come with 2 x 1 gb.
i agree with the first point
i have not done anything like that