System waking at same time every day but no lastwake info  

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  1. itm
    Posts : 120
    Windows 7
       #1

    System waking at same time every day but no lastwake info


    My Windows 10 Pro (21H2) machine wakes from sleep every day at the same time (around 20:10). If I run powercfg /lastwake it shows:

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

    I have disabled ALL tasks in Task Scheduler, and I can't see anything in the Event Viewer which gives a clue as to what is waking the machine.

    The hardware is a ThinkCentre M720q.

    Any ideas for how I can diagnose this?
      My Computer


  2. Posts : 284
    Windows 10 Pro
       #2

    Have you tried unplugging the ethernet cable, wakeonlan might be set.
      My Computer


  3. itm
    Posts : 120
    Windows 7
    Thread Starter
       #3

    Hearsepilot said:
    Have you tried unplugging the ethernet cable, wakeonlan might be set.
    No but I have just disconnected it, and will check to see if the system wakes tomorrow evening - thanks for the suggestion.

    If WOL is set I'm not sure what is triggering a network event on this machine at the same time every day.
      My Computer


  4. Posts : 284
    Windows 10 Pro
       #4

    Maybe your router is sending a wake packet, you'll find out by tomorrow evening if its unplugged.
      My Computer


  5. itm
    Posts : 120
    Windows 7
    Thread Starter
       #5

    Hearsepilot said:
    Maybe your router is sending a wake packet, you'll find out by tomorrow evening if its unplugged.
    Any idea why a router might do that, if it hasn't been explicitly instructed to do so?
      My Computer


  6. Posts : 284
    Windows 10 Pro
       #6

    Virus maybe, just unplug for now to localise the issue and work from there. My router has a wake function, maybe yours has.
      My Computer


  7. Posts : 14,300
    Windows 10 Home x64 Version 22H2 Build 19045.2728
       #7

    itm said:
    ... I can't see anything in the Event Viewer which gives a clue as to what is waking the machine. ...
    Did you look at
    Log - System
    Source - Power-Troubleshooter
    EventID - 1
    and the events immediately before it [in Custom view, Administrative events or a third-party event viewer that has a simple chronological view]?


    Are there any automatically turn on at ... entries in the Bios?


    Denis
      My Computer


  8. itm
    Posts : 120
    Windows 7
    Thread Starter
       #8

    There was a Power Troubleshooter event ("the system has returned from a low power state"), but I don't see anything prior to it that would explain the waking from sleep - see image of event viewer below:
    System waking at same time every day but no lastwake info-win10resume.png
    The BTHUSB event detail was:
    "Windows cannot store Bluetooth authentication codes (link keys) on the local adapter. Bluetooth keyboards might not work in the system BIOS during start-up."
      My Computer


  9. Posts : 14,300
    Windows 10 Home x64 Version 22H2 Build 19045.2728
       #9

    Was anything useful stated in the General & Details tabs for that Power Troubleshooter event ("the system has returned from a low power state")?

    My General tabs for that event always include a 'Wake Source' entry that is more informative than the PowerCfg -LastWake data.


    Denis
      My Computer


  10. itm
    Posts : 120
    Windows 7
    Thread Starter
       #10

    Try3 said:
    Was anything useful stated in the General & Details tabs for that Power Troubleshooter event ("the system has returned from a low power state")?

    My General tabs for that event always include a 'Wake Source' entry.


    Denis
    This was the detail for the Power-Troubleshooter event:
    Code:
    The system has returned from a low power state.
    Sleep Time: ‎2022‎-‎12‎-‎05T20:12:11.566681100Z
    Wake Time: ‎2022‎-‎12‎-‎06T20:11:35.299495800Z
    
    Wake Source: Unknown
    Code:
    - EventData 
    
      SleepTime 2022-12-05T20:12:11.5666811Z 
      WakeTime 2022-12-06T20:11:35.2994958Z 
      SleepDuration 33230 
      WakeDuration 1799 
      DriverInitDuration 316 
      BiosInitDuration 903 
      HiberWriteDuration 3993 
      HiberReadDuration 0 
      HiberPagesWritten 307245 
      Attributes 1912619025 
      TargetState 4 
      EffectiveState 5 
      WakeSourceType 0 
      WakeSourceTextLength 0 
      WakeSourceText  
      WakeTimerOwnerLength 0 
      WakeTimerContextLength 0 
      NoMultiStageResumeReason 0 
      WakeTimerOwner  
      WakeTimerContext  
      CheckpointDuration 29
      My Computer


 

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