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Mac Pro refuses to sleep?
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Senior User
Join Date: Aug 2006
Location: Toronto, Ontario
Status:
Offline
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Hi there
for some random reason my Mac Pro refuses to sleep? 
any suggestions why this might be?
i click on sleep --->1 or 2 HDS turn off and immediately it wakes up
it takes me roughly 10 times to put it to sleep doing this way
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R.I.P Steve Jobs
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Baninated
Join Date: Aug 2007
Location: i have moved to another location per peter's message
Status:
Offline
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Have you installed the latest PMU updates?
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Senior User
Join Date: Aug 2006
Location: Toronto, Ontario
Status:
Offline
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R.I.P Steve Jobs
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Professional Poster
Join Date: Jun 2007
Status:
Offline
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Do you have any usb devices (other then keyboard and mouse) connected? Try disconnecting them and putting it to sleep.
My Mac will not go to sleep if my scanner is on.
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Senior User
Join Date: Aug 2006
Location: Toronto, Ontario
Status:
Offline
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i have over 20 usb devices plugged in right now
ill try that later on when the mac is not needed
why does this happen in the first place?
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R.I.P Steve Jobs
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Dedicated MacNNer
Join Date: Feb 2001
Location: Victoria, BC, Canada
Status:
Offline
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Oh yeah, it'll be one or more of those devices causing your problem. Also, if you have installed an additional USB PCIe card it could also be causing your problem. Expansion cards are notorious for causing sleep issues.
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Senior User
Join Date: Aug 2006
Location: Toronto, Ontario
Status:
Offline
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its most likely a usb device
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R.I.P Steve Jobs
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Mac Elite
Join Date: Nov 2001
Status:
Offline
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Originally Posted by mkerr64 
i have over 20 usb devices plugged in right now
ill try that later on when the mac is not needed
why does this happen in the first place?
LOL. 20 USB devices?
I can guarantee you that one of them is sending a "Hey, wake up!" signal to the Mac Pro and that's what's prohibiting sleep.
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