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MacBook Pro goes to sleep without any reason

N

nipponfan

macrumors regular
Original poster
Nov 10, 2008
116
0
Austria
This happened to me a few times lately: my pro is going into standby without any apparent reason and wakes itself up again instantly. It happened on battery and on AC power, I didn't run any special progams, as far as I can remember I was just watching movies with QuickTime.
I got all updates and running nothing special. Any idea how to fix this?
 
Does it happen when you are using it, for example, when typing, or using the trackpad/mouse?

Or is it playing a movie for a period of time, then going to sleep?

If the latter, I would say it is going to sleep after an idle period of time. Check your display settings.
 
Believe me it's not that - both on battery and ac it's set to never go to sleep.
Besides I am always doing somthing while watching a movie - surfing, IM, etc. I have really no idea what else it could be.
 
I go to sleep for no good reason myself. What's the issue:)

Just had to be said. But when quicktime is running things like the mouse and all that are not moving to keep it awake . It is just a open window so i am pretty sure and this has happened to me when running a color calibration it will go to sleep. I think you actually need to be doing something to keep it awake and even a DVD movie this could occur. I think sleep mode is dependent on key strokes and mouse being used.
 
Do you have any watches or bracelets that contain any magnets? This may be the cause.
 
When it wakes up, OS X records in the system.log file both why it woke up and why it had gone to sleep. See what it says.
 
Are you using a cellphone and setting it down on the case? That causes my MacBook Pro to go to sleep and based on the cause, anything with a magnet in it will probably do the same. More details at the end of this thread:
https://forums.macrumors.com/threads/690152/

here's the relevant bits of the log file:
Apr 24 18:25:02 kernel[0]: Going to sleep
Apr 24 18:24:58 kernel[0]: System SafeSleep
Apr 24 18:25:02 kernel[0]: sleep
Apr 24 18:25:02 kernel[0]: Wake reason = EC
Apr 24 18:25:02 kernel[0]: System Wake
Apr 24 18:25:02 kernel[0]: Previous Sleep Cause: 5
 
gizmo66 said:
Are you using a cellphone and setting it down on the case? That causes my MacBook Pro to go to sleep and based on the cause, anything with a magnet in it will probably do the same. More details at the end of this thread:
https://forums.macrumors.com/threads/690152/

here's the relevant bits of the log file:
Apr 24 18:25:02 kernel[0]: Going to sleep
Apr 24 18:24:58 kernel[0]: System SafeSleep
Apr 24 18:25:02 kernel[0]: sleep
Apr 24 18:25:02 kernel[0]: Wake reason = EC
Apr 24 18:25:02 kernel[0]: System Wake
Apr 24 18:25:02 kernel[0]: Previous Sleep Cause: 5
Click to expand...

Thanks, I think this is could be the reason! I use a Nokia 6500 slide which has a steel casing - it might have touched my pro since it's always laying next to it. I will check that the next time it happens, but I think this is what is causing it.
 
OP, had this same issue about a month after getting my UMBP (around December). Geniuses were perplexed and I ended up sending it to Apple. They replaced the logic board I believe and all is well now. Good luck!
 
gizmo66 said:
Are you using a cellphone and setting it down on the case? That causes my MacBook Pro to go to sleep and based on the cause, anything with a magnet in it will probably do the same. More details at the end of this thread:
https://forums.macrumors.com/threads/690152/

here's the relevant bits of the log file:
Apr 24 18:25:02 kernel[0]: Going to sleep
Apr 24 18:24:58 kernel[0]: System SafeSleep
Apr 24 18:25:02 kernel[0]: sleep
Apr 24 18:25:02 kernel[0]: Wake reason = EC
Apr 24 18:25:02 kernel[0]: System Wake
Apr 24 18:25:02 kernel[0]: Previous Sleep Cause: 5
Click to expand...

Yup. MBPs know when the lid is closed by using a magnetic sensor. When you place a magnet on the middle right hand side of your laptop, it will go to sleep and then wake back up when the magnet is gone.
 
Warranty Voider said:
Yup. MBPs know when the lid is closed by using a magnetic sensor. When you place a magnet on the middle right hand side of your laptop, it will go to sleep and then wake back up when the magnet is gone.
Click to expand...

Holy crap it did it!

Now I have to start that huge FTP transfer over again...
 
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