Solved Win 7 hibernates for an hour - then pops up w/lock screen

June 30, 2014 at 19:39:11
Specs: Windows 7 Ultimate, Intel E6400 / 1GB DDR2
This is a clean build, two days old. "On resume, display logon screen" is unchecked in the screen saver settings. No screen saver set, no password set.

It's running on the stock "balanced" power setting. I can leave it alone for 5 minutes, and the screen will turn black; a bit longer and it'll hibernate.

However, if I leave it untouched long enough - I haven't timed it, but an hour seems about right - the screen will awake from hibernation on its own (it is not the mouse creeping either) and display the lock screen again.

Any ideas?


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June 30, 2014 at 20:44:06
✔ Best Answer
Have you checked task scheduler?

There could be a task that is set to wake it after 1 hour of hibernation.

Though why this would occur after only 2 days I don't know.

Open CMD (Run as Admin) and type the following:

powercfg -lastwake

Do this after it wakes from hibernation, and it should tell you what awoke it.

If it is a hardware device waking the computer, do this:

Start > Control Panel > System and Security > System > Device Manager

Then click the device that is waking your computer. Under the Power Management tab, uncheck the box that says Allow this Device to Wake the Computer.

If it's software that is waking the computer, do this:

Start > Control Panel > System and Security > Power Options > Change Plan > Change Advanced Power Settings

Click the Advanced tab. Click the arrow next to Sleep or Hibernate, and disable Allow Wake Timers.

Admittedly, the Lock Screen is a bit confusing.

Is there a chance of malware?

Let us know if this helps!

EDIT: How to change Windows power settings.

User Info Page for full specs.

message edited by NT56erbx

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June 30, 2014 at 20:52:38
Oh, I was going on the assumption that he (or she) already tried that...

User Info Page for full specs.

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Related Solutions

June 30, 2014 at 20:56:51
>>SOLUTION (part #1)

I've figured half of it out. Not the return from hibernation, but the lock screen:

I was able to shut off the lock screen as follows:

Control Panel > Power Options > Change Plan Settings (doesn't matter if you have Balance/High Performance/Power Saver checked, just click the plan settings for your present setting) > Change advanced power settings: Balanced > Require a password on wakeup > Setting: No

Default for the "Balanced" power plan appears to be "yes."

That said, it just woke up 4 minutes ago from hibernation with no lock screen. Hard drive spooled up and the screen came on.

I'll check the last wake now.

FYI: Johnw, I don't mind if the computer goes to sleep; I prefer it. I mind if I get the lock screen every time I return to it, and I also mind if it turns back on at its own whim when I want it to hibernate through the night.

FYI #2: I'm not sure if I've specified this, but it's Windows 7 Ultimate.

message edited by cudak

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June 30, 2014 at 21:05:58
What’s the Difference Between Sleep and Hibernate in Windows?
These options include Sleep, Hibernate, and Hybrid Sleep and are very useful if you are using a laptop.

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June 30, 2014 at 21:08:35
"FYI #2: I'm not sure if I've specified this, but it's Windows 7 Ultimate"
You did.

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June 30, 2014 at 21:16:40
It's not a laptop, and I see no point in fiddling around with the default sleep settings when we haven't determined why the defaults are not working as intended.

>>SOLUTION, part #2

That said, following NT56erbx's advice, I ran powercfg -lastwake. Result:

Last wake was from Instance Path: usb_root_hub\4&10b2c51b&0

Only one thing is plugged into any USB port on the computer at the moment, and that's the mouse. The Device Manager confirms that usb_root_hub\4&10b2c51b&0 is the hub to which the mouse is connected.

The hub does not have the ability to wake, but the mouse (obviously) does.

So it is the mouse creeping - more or less on the hour - and I was so sure it was NOT a hardware issue.

Time to take a bubble level to the desk and find out why it is creeping. Either that or the laser is being triggered by an ant.


message edited by cudak

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June 30, 2014 at 21:18:46
"It's not a laptop"
Yep, that's the point, those options are mainly aimed at laptops.

message edited by Johnw

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June 30, 2014 at 21:25:12
This thing is used by someone who lets it run all night and doesn't tell me when anything is wrong with it. I need it to hibernate completely at night to save power and physical wear, and I need the user's GUI to be as dummy-proof as possible.

Now that the lock screen is taken care of, I've moved the mouse for tonight. We'll see what happens in the morning.


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July 1, 2014 at 04:44:21
"I need it to hibernate completely at night to save power and physical wear"

Hibernate is not the way to do it. As stated, that feature is primarily for laptops & mobile devices. I suggest you manually configure the power settings. Also, in the specs you list only 1GB RAM? That's not nearly enough for Win7 Ultimate.

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July 1, 2014 at 20:07:59
Hybrid Sleep is default for desktops and has worked for me from Windows 95 through Windows 7 at ho,e and Windows 8 at work. Microsoft Does recommend this for desktops and I have always used it on all of my machines without any problems. The only problem comes up if the hard drive is also set to power down since this is part of the process itself, having it set that way and you hve trouble in waking sometimes. Please read this from Microsoft (even if you never plan on using sleep or hibernate on your desktop, but especially if you are giving advice on the subject):

You have to be a little bit crazy to keep you from going insane.

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July 1, 2014 at 20:12:37
Riider, what would you suggest to choose for power management in such a situation then?

That said, I realize I'm 1GB short for an X64 machine, but I don't have a spare unit that I can pull some DDR2 sticks out of at the moment. I knew I could get away with 1 gig for now, and it does run pretty good as-is. Should be able to pick up 8gb of DDR2-667 on eBay, cheap.


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