Windows 7 will not go to sleep when it's on battery

I recently replaced the laptop battery on my Acer 5517 inspire running windows 7. Battery power when I leave Internet race 11 explore (and maybe some other programs) the computer will not sleep after awhile... it remains right on until the battery runs out and is not yet put into hibernation when the critical battery level is reached. The computer works fine and will go to sleep after 30 minutes, when it is plugged in or when I have it on battery with any running application. This issue is frustrating because if I forgot to plug my computer and let a program run the next morning I need to restart windows and get the message that windows did not close properly. I am frustrated because the system hibernate properly when battery reaches a critical level in certain conditions that I mentioned, but when it's on battery and an application running that he do not hibernate when battery level critical is reached.

Hi Cory,.

Sorry for the delay in response.

SCP may not sleep when you use internet via the network. Windows is not designed to do by default when you do a video or audio stream from the internet.

First, launch a command prompt window using the "Run as Administrator" option. (Search for "cmd", right click and select "run as administrator").

Then run this command: powercfg-applications

What this will do, is tell you all the programs or devices that currently prevent the system from going into sleep mode. In cases, it reported that my audio device was causing the problem. The message was "an audio stream is being used."  This could be caused by something as simple as a web browsing with Flash content.  See screenshot...

So now that you know what prevents mode 'sleep', you ask the power management system to ignore this device and go ahead and enter the mode "Eve" anyway.  In my case, it was my audio card called "High definition Audio Device".  Yours will vary - it could talk about Creative Labs, SoundMax, RealTek, etc.. Or it could be any other device all together (network card, mouse, keyboard, etc.).  You need to specify exactly the same name in the following command.

For me, the command is: powercfg - REQUESTSOVERRIDE DRIVER "High definition Audio Device" SYSTEM

Now that I've told management system of power to ignore any audio stream opened by this device, he falls asleep without any problem.

I hope this helps. Let us know if you need help with Windows.

Tags: Windows

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