Windows 7 wakes immediately from sleep - no wake history

07
2013-09
  • imsometa

    I have 64-bit Windows 7 Pro installed on a OCZ Vertex 3 SSD. The machine automatically wakes straight up from sleep, whether it happens when after the timeout set in power settings for sleep, or when I manually tell the machine to sleep.

    I have tried using the following command to see what device is waking up my computer:

    powercfg /lastwake

    but I always get:

    Wake History Count - 0

    I believe it might be related to the SSD, I have tried using the same hardware on a HDD, and have no problems with sleep. I have tried both a Vertex 2 and Vertex 3, and neither would go to sleep, with exactly the same behaviour from powercfg

    • Answers
  • Griffin

    I am have a totally forgetful moment and will update this when I remember what it's called but SSDs don't have a particular section designated for "going to sleep". This prevents them from using that function. The big reason for this has the do with your RAM I believe and how it plays with the SSD.


    • Related Question

    windows 7 - Wake timers don't wake computer from sleep mode
  • Joe

    I'm got a custom built PC running 64 bit Windows 7 Ultimate. So far everything works great except for one thing: it will not wake up from sleep mode for a wake timer or scheduled task.

    Sleep mode itself works great. If it's sleeping, it wakes successfully when I press the power button, mash the keyboard, wiggle the mouse, or send a WOL packet. The only problem is wake timers. I even tried the program WakeupOnStandBy but it looks like that uses wake timers, so it doesn't do anything for me either.

    And yes, wake timers are enabled:

    enter image description here

    Any ideas on how to fix the problem, or troubleshoot it? I'd imagine that there would be a log somewhere telling me exactly why the wake timers are having trouble, but if there is I haven't found it.


    • Related Answers
  • Alois Mahdal

    I've struggled with this problem before, and have only been able to do it on one of my PCs.

    Some things to try:

    • Does your PC have a wake timer feature in the BIOS? If not, it may not be capable of waking up to a schedule.
    • Try changing the Bios sleep modes, i.e. S1, S2 etc.
    • Also, the one PC I can wake up to a schedule has ACPI 2.0 enabled in the BIOS. (Not sure if that is relevant or not.)

    Sorry I can't give you a definitive solution.

  • Synetech

    I too would advise checking the BIOS like Roh suggested. More specifically, check the power-management options and report the settings, particularly the one that selects whether to use S1 or S3 for standby.

    You can also use Microsoft’s power utility to get a dump of Windows’ power-management settings.

  • Diogo

    Check out your Power Management Options on your Control Panel:

    1. Start,
    2. Control Panel,
    3. Power Settings,
    4. Change plan settings,
    5. Change advanced power settings). -> “Sleep” option, “Allow wake timers.” ->"Enable"

    I had the same issue and fixed this way.

  • staticsan

    I'm pretty sure you will need to enable the wake timer in the BIOS. It doesn't matter what time you set it to, there just has to be a value. That makes the wake-timer enabled and the OS can update it with whatever it wants. It's a slightly wierd UI, but that's what the BIOS writers seem to have standardised on.