Sleep Mode Issues on PC/Laptop

I posted previously a sleep mode with the computer in slowing the climate change, and there could be some issues on using sleep mode with the system. Ok, here are the most common problems and how to solve these.

What are the most common causes of notebook sleep issues?

• A process running on the system does not allow the system to enter sleep mode.
• A hardware interrupt, such as some peripheral devices for example.
• An unstable driver which does not properly support sleep states or is just buggy.

Solutions:

1. Make sure that all of the latest updates are installed for your operating system (Windows Update on Microsoft Windows, Software Update on Mac OS X, your favorite package manager on Linux).
2. Close any running programs on the system (and exit any programs which are running in the notification area which is next to the clock on Windows systems).
3. Unplug all external devices (USB, FireWire, etc.) This includes your external keyboard and mouse if you're using one, your printer, and whatever else you have plugged in. And no, your USB-powered rocket launcher isn't an exception, even though it is really cool.
4. Use the "Sleep" option in your operating system to put the computer to sleep instead of the lid (Start > Turn Off Computer > Sleep on Windows XP, Apple menu > Sleep on Mac OS X).
5. Once the computer has gone to sleep, close the lid.

Mind you, some notebooks with older NVIDIA drivers on Windows Vista may cause your computer to go into a perpetual coma every time it falls asleep. If your notebook manufacturer hasn't provided you with a newer graphics driver, I'd recommend consulting a sleep therapist LaptopVideo2Go.com, which has all of the latest NVIDIA drivers and modified INF files for installing them on any NVIDIA graphics card.

Reference from neosmart.net, read more.

Those who are interested to control which devices will wake or disable_wake during the computer in sleep mode. You can try some commands in running in a command prompt.

   powercfg -devicequery wake_from_any

This lists all the hardware devices that are capable of waking up the computer from standby. But the operating system typically ignores most of them. To see the ones that are not being ignored, run the command

    powercfg -devicequery wake_armed 

This second list is typically much shorter. On my computer, it listed just the keyboard, the mouse, and the modem. (The modem? I never use that thing!)

You can disable each of these devices one by one until you find the one that is waking up the computer.

    powercfg -devicedisablewake "device name" 

(How is this different from unchecking Allow this device to wake the computer from the device properties in Device Manager? Beats me.)

Once you find the one that is causing problems, you can re-enable the others.

    powercfg -deviceenablewake "device name" 

I would start by disabling wake-up for the keyboard and mouse. Maybe the optical mouse is detecting tiny vibrations in your room. Or the device might simply be "chatty", generating activity even though you aren't touching it.

Reference from blogs.msdn.com, read more.