Waking Laptop on AC Power

This is a discussion on Waking Laptop on AC Power within the Windows Programming forums, part of the Platform Specific Boards category; I was wondering if there is some API/trick/hack that would allow a laptop to wake up from sleep when it ...

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    Waking Laptop on AC Power

    I was wondering if there is some API/trick/hack that would allow a laptop to wake up from sleep when it senses that it is connected to power, or that its battery is charging. I know I could build an external device that would send a wake-up network packet when it senses power, but I want to do this purely in software, i.e. via API.

    If this cannot be done on Windows, perhaps Linux?

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    I don't think it would have anything to do with OS. When the computer is sleeping, the CPU is shut off, so no code is running. You'll have to somehow do it in BIOS.

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    Malum in se abachler's Avatar
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    yes, the APM API will let your application detect whether it is on battery only or connected to AC. It could then issue a wakeup command. I believe you would only be able to have it in low power mode though, as the aplications has to actually run occasionally.
    Until you can build a working general purpose reprogrammable computer out of basic components from radio shack, you are not fit to call yourself a programmer in my presence. This is cwhizard, signing off.

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    ACPI does, too. But the computer will have to be awake to check it.

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    Malum in se abachler's Avatar
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    Quote Originally Posted by cyberfish View Post
    ACPI does, too. But the computer will have to be awake to check it.
    Yeah i don't think it can go into full shutdown, or hibernate, but there are a few modes it can use that still allow applications to occasionally process WM_ or APM_ message


    http://msdn.microsoft.com/en-us/libr...35(VS.85).aspx
    Last edited by abachler; 09-26-2009 at 12:14 AM.
    Until you can build a working general purpose reprogrammable computer out of basic components from radio shack, you are not fit to call yourself a programmer in my presence. This is cwhizard, signing off.

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    i think u can make a pc wake up from shutdown by wake on lan it allows pc in network to open each other

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    Malum in se abachler's Avatar
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    Quote Originally Posted by elwad View Post
    i think u can make a pc wake up from shutdown by wake on lan it allows pc in network to open each other
    Theres an easier way than that, as the article i linked to says, you just have to create a waitable timer.
    Until you can build a working general purpose reprogrammable computer out of basic components from radio shack, you are not fit to call yourself a programmer in my presence. This is cwhizard, signing off.

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