Windows – System insomnia! Wakes up after 50 seconds after going to sleep

sleepwindows 7

My desktop won't stay asleep. It consistenly wakes back up after approximately 50 seconds.

This happens regardless of whether I manually select Sleep from the start menu, or if it goes to sleep on its own.

System Specs:

  • Windows 7 64-bit Service Pack 1 (problem also existed prior to service pack)
  • ASUS M3N78-VM motherboard.
  • AMD Phenom II X6 1055T Processor 2.80GHz
  • 8 GB Ram
  • Samsung SSD 830 Series 64GB SSD drive (boot drive)
  • 2 SATA HDDs mirrored with onboard NVIDIA RAID AMD Radeon
  • HD 6950 Video Card (problem existed before this was added)

All devices in Device Manager appear to have the correct device drivers. No yellow exclamations.

Things I've tried:

  • BIOS set to S3 Only (previously set to auto)
  • All "Power On By" options in the BIOS set to Disabled
  • Unplugged all USB devices (including KB/Mouse), Network Cable, and
    Monitor Cable
  • Unchecked "Allow this device to wake the computer" on Network
    Interface
  • Disabled the "USB selective suspend setting" in advanced power options.
  • powercfg -devicedisablewake for all devices that show up in the "wake_armed" list

powercfg -lastwake reports:

Wake History Count - 1
Wake History [0]
Wake Source Count - 0

I have several events in the system event log that look like this:

The system has resumed from sleep.

Sleep Time: ‎2012‎-‎01‎-‎21T15:18:12.274800000Z
Wake Time: ‎2012‎-‎01‎-‎21T15:19:23.638800000Z

Wake Source: Unknown

If anyone has troubleshooting suggestions for this, I would greatly appreciate them as I'd like to solve this problem so my computer can get a good night's rest!

Best Answer

Did you check for waketimers? In your advanced power options, try disabling the wake timers (under "sleep"). If that fixes the problem, check under powercfg -waketimers, that should give you an idea of what is waking it.

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