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powercfg must be run from an elevated command prompt, and, under Windows XP, it requires workstation Administrator or power user rights. Power Schemes are configured on a per-user basis. The most common cause of problems with power saving and hibernation on Windows systems is an incompatible device driver.
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 pressing the power button, restoring all running applications in their current running state), or to shutdown the PC completely (closing all ...
Microsoft Windows supports predefined power plans and custom sleep and hibernation settings through a Control Panel Power Options applet. [3] Apple's macOS includes idle and sleep configuration settings through the Energy Saver System Preferences applet. [4] Likewise, Linux distributions include a variety of power management settings and tools. [5]
Place computer into sleep/standby mode Windows 10: ⊞ Win+x > u > s. Windows 7: ⊞ Win+→+→+↵ Enter. Sleep (available on some keyboards) ⌥ Opt+⌘ Cmd+Eject: Sleep (available on some keyboards, configurable in Control Panel Power Options Advanced tab dialog box) Shut down computer Windows 10: ⊞ Win+x > u > u: Ctrl+⌥ Opt+⌘ Cmd+Eject
Advanced Configuration and Power Interface (ACPI) is an open standard that operating systems can use to discover and configure computer hardware components, to perform power management (e.g. putting unused hardware components to sleep), auto configuration (e.g. Plug and Play and hot swapping), and status monitoring. It was first released in ...
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On the other hand, a system in sleep mode still consumes power to keep the data in the RAM, and thus cannot last indefinitely, as hibernation can. Detaching power from a system in sleep mode results in data loss, while cutting the power of a system in hibernation has no risk; the hibernated system can resume when and if the power is restored.
Many mammals (including some primates) hibernate, and the strategy can be seen across the animal kingdom—even occurring in the summer in a process known as estivation.