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This is the situation: this is a Dell Optiplex 755, I recently upgraded it to Windows 7 64-bit, it had Windows XP SP3 previously. on XP I never had a problem hibernating the PC, now with Windows 7 64 every time I hibernate the PC it wakes it self after 5 or so seconds.

Here are the steps I already tried:

On Windows 7 I enabled the hibernation following this steps

  • In the MoBo the sleep settings are on S3
  • In the Mobo I disable remote wake ups
  • I have disabled the remote wake up in the NIC
  • When I run the lastwake command I get unknown device or something like that
  • I already disable the wake timers on Windows
  • I have the latest drivers from Intel, but I just found out that in the device Manager I get a warning sign on the "Intel AMT SOL (COM3)" device saying that it failed and windows stopped the device, I reinstalled the Intel drivers but nothing changed.

The only thing that I haven't touch is Intel ME in the MoBo but I don't if that could help and what settings are correct.

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  • Restart? Have you checked the event log for any errors that happen when it hibernates? When a crash happens, the system can have an automatic restart process. If anything is waking up the system, it would return back to windows. Sounds like a bad driver somewhere. Can you enter sleep mode without it restarting? Dec 8, 2010 at 19:55
  • What i meant with restarts it's that wakes up without any user interaction, in the event log all I can see is that an unknown device waked the computer, I'll edit the question to avoid confusion Dec 8, 2010 at 20:00
  • Most documents are written for laptops, and I cannot find one on Dell.com, here are some suggestions from HP...h10025.www1.hp.com/ewfrf/wc/…
    – Moab
    Dec 8, 2010 at 23:51

2 Answers 2

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This might help:

  • right-click network icon in taskbar
  • open network and sharing center
  • change adapter settings
  • right-click your network adapter and choose "properties"
  • click the "configure" button
  • click the "power management" tab
  • un-check: allow this device to wake the computer

I think this should resolve your issue?

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  • this is what I did on my third step Dec 9, 2010 at 16:38
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it turns out that the culprit was my Microsoft SideWinder X8 Mouse.

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  • so I would file this under "disconnect all USB devices when troubleshooting sleep issues" Dec 24, 2010 at 7:00

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