Power-Troubleshooter – what can cause “Wake Source: Unknown”

User919 16 Reputation points

Let use sample event

The system has returned from a low power state.
Sleep Time: ‎2020‎-‎10‎-‎09T06:47:50.010484400Z
Wake Time: ‎2020‎-‎10‎-‎09T07:40:18.281270500Z
Wake Source: Unknown

What can cause that MS Windows do not gather information about wake source? I guess when system is smart enought to be able to wake up by signal from some device like mouse or graphic tablet, it should be also capable of gathering information about signal source.

Why is this information not filled? Is it due cheap HW, bad settings of USB controllers, badly chosen USB ports for particular devices, UEFI settings, bad device settings, bad power management setting, …?

Windows 10 Setup
Windows 10 Setup
Windows 10: A Microsoft operating system that runs on personal computers and tablets.Setup: The procedures involved in preparing a software program or application to operate within a computer or mobile device.
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  1. Dave Patrick 426.1K Reputation points MVP

    Might look for tasks with this checkbox checked.


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  2. Dale Kudusi 3,266 Reputation points

    Since the wakeup can be caused by network communication, media application, security application or even the task schedule, you could check out the energy report for more clues.

    Type powercfg /energy in the elevated Command Prompt.


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