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  2. Power key - Wikipedia

    en.wikipedia.org/wiki/Power_key

    Notebooks also include an invisible button in the screen lid, so that closing the screen on the keyboard will activate the sleep function. In Windows, this can be configured to enter one of the "sleeping modes", i.e. "suspend to RAM" (with fast wake up by pressing any key) or "suspend to disk" (i.e. hibernation, where waking up will require ...

  3. Sleep mode - Wikipedia

    en.wikipedia.org/wiki/Sleep_mode

    In addition to a wake-up press of the power button, PCs can also respond to other wake cues, such as from keyboard, mouse, incoming telephone call on a modem, or local area network signal. [citation needed] A real-time clock alarm can schedule the computer to wake from sleep mode. [1]

  4. Spurious wakeup - Wikipedia

    en.wikipedia.org/wiki/Spurious_wakeup

    The system treats every signal( ) to wake one thread as a broadcast( ) to wake all of them, thus breaking any possibly expected 1:1 relationship between signals and wakeup. [1] If ten threads are waiting, only one will win and the other nine will experience spurious wakeup.

  5. Sleep (system call) - Wikipedia

    en.wikipedia.org/wiki/Sleep_(system_call)

    An uninterruptible sleep state is a sleep state that will not handle a signal right away. It will wake only as a result of a waited-upon resource becoming available or after a time-out occurs during that wait (if specified when put to sleep). It is mostly used by device drivers waiting for disk or network IO (input/output).

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Hibernation (computing) - Wikipedia

    en.wikipedia.org/wiki/Hibernation_(computing)

    Windows 2000 is the first Windows to support hibernation at the operating system level (OS-controlled ACPI S4 sleep state) without special drivers from the hardware manufacturer. A hidden system file named " hiberfil.sys " in the root of the boot partition is used to store the contents of RAM when the computer hibernates.

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