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I have a problem that I first noticed yesterday. Whenever I would press the half moon standby button on my keyboard, my computer would go to sleep. I also have a shortcut on my desktop configured to put my computer into hibernate. But now whenever I try to put my pc in sleep or hibernate mode, my monitor goes black for a few seconds but then comes back on at the login screen.

I haven't installed or changed anything other than create a couple logical partitions in the hfs+ filesystem. (still in the process of trying to triple-boot)

Any help would be great, but for now I'm going to bed. Will check back in the morning.

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Are you plugged in via ethernet or are you using wifi? – jsejcksn Sep 3 '10 at 3:29
Ethernet, just like I have been for months. – Thomas B. Sep 3 '10 at 15:46

Go look at your Device Manager, review the Power Management property tab of all your input devices and USB devices. Ensure the Allow this device to wake the computer option is not checked.

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If you do that, I'm not sure that you'll be able to use your keyboard and mouse to wake up your computer... – jsejcksn Sep 2 '10 at 7:16
Neither my mouse or keyboard are USB. But good thinking and thanks for the warning. I'm gonna try it now. – Thomas B. Sep 2 '10 at 17:03
In all of the power management tabs, the "Allow this device to wake the computer" is grayed out. – Thomas B. Sep 2 '10 at 17:05
@pattern86 it's a trade-off. Some of these dang input devices INSIST on maintaining active comms with the computer and preventing it from sleeping, like mine. T__T I usually use the power button to wake the computer anyway. – icelava Sep 3 '10 at 1:52
Well I still have not figured out why I can't get into sleep or hibernate mode. I'm not using a new keyboard or mouse and it's only been happening since two days ago. Like I said the only changes I've made to ANYTHING were the two logical hfs+ partitions. So do you have any more ideas? :) – Thomas B. Sep 3 '10 at 2:28

Whenever I've had this issue, it's been because of a process in the background that's running that I didn't realize. Check you taskmanager and make sure there aren't any processes that you don't recognize, or are taking up an unusual amount of resources.

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This is pretty darn vague advice. Also, it processes shouldn't have the ability to unhibernate your computer just by running. They may set a wake timer or something like that that tells your computer to wake up at some point, but the processes aren't actually running while your computer is hibernating - so they can't wake your computer up. Can you mention what you actually have done to solve your problem in the past? – B T May 24 '15 at 7:44

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