Display off on sleep and I cannot wake it up

Good day,
Here is an issue:
When my mac is going to sleep mode after 5-15 minutes when it is working with battery and in the middle of this process I swipe touchpad dispay turning off.
Macbook works but display does not, because I can still talk via skype.
Only one solution is hard reset.
The same issue when mac going to sleep mode and connected to AC.
I noticed that this is very exact time when you can do this, because one second before or later and this is not happening.

Reset SMC. http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
Best.

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Ops I replied to myself in error.....
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Let me know if this helps. Have a lovely day.
Please click the white star under my name to give me Kudos as a way to say "Thanks!"
Click the "Accept as Solution" button if I resolve your issue.

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roam
Message was edited by: roam

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Hello,
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When i close the computer again, the light stay On, when i open the computer again nothing happen, the screen is black, no buttons works, nothing happen.
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this happen to me every day !
i try:
Remove the charger = Same Problem
With the charger = Same Problem
With Apple Bluetooth mouse = Same Problem
Without Apple Bluetooth mouse = Same Problem
With External HD = Same Problem
Without External HD = Same Problem
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Well. in my searching i find an """"Answer"""
Some body was talking about that the new's Mac have something called "Safe Sleep" so when someone sleep the Mac the Information of the Ram make a copy in the HD this can take for 30 seconds to a minute. In this time, if you move the mac or do something else, generate a error and corrupt the Information of the ram and the Mac stop working.
Say that to remove this "Safe Sleep" have to open the terminal and:
The Unix command to disable SafeSleep is:
sudo pmset -a hibernatemode 0
To re-enable SafeSleep, the command is:
sudo pmset -a hibernatemode 3
Maybe Apple going to Fix this in future Updates.
Sorry for my English !

Display off on sleep and I cannot wake it up

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