Foxconn H67S User manual - Page 42
Power On Suspend
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Power Aptio Setup Utility - Copyright (C) 2010 American Megatrends, Inc. Main Advanced Chipset Boot PPoowweerr Health Security Save & Exit ACPI Sleep State Resume By PS2 Keyboard Resume By PS2 Mouse Resume By Onboard LAN Resume By USB Device(s) Resume By PCIE PME Resume By RTC Energy-using Products Restore AC Power Loss [S3] [Enabled] [Enabled] [Disabled] [Enabled] [Disabled] [Disabled] [Enabled] [Power Off] Select the highest ACPI sleep state. The system will enter when the SUSPEND button is pressed. →←: Select Screen ↑↓: Select Item Enter: Select +/-: Change Opt. F1: General Help F2: Previous Values F3: Optimized Defaults F4: Save & Exit ESC: Exit 3 Version 2.02.1205. Copyright (C) 2010 American Megatrends, Inc. ACPI (Advanced Configuration and Power Interface) is an open industry standard interfaces enabling OS-directed configuration, power management, and thermal management of mobile, desktop, and server platforms. It defines five sleeping states, they are : S1 - The S1 sleeping state is a low wake latency sleeping state. In this state, no system context is lost (CPU or chip set) and hardware maintains all system context. (also called Power On Suspend) S2 - The S2 sleeping state is a low wake latency sleeping state. This state is similar to the S1 sleeping state except that the CPU and system cache context is lost (the OS is responsible for maintaining the caches and CPU context). Control starts from the processor's reset vector after the wake event. S3 - The S3 sleeping state is a low wake latency sleeping state where all system context is lost except system memory. CPU, cache, and chip set context are lost in this state. Hardware maintains memory context and restores some CPU and L2 configuration context. Control starts from the processor's reset vector after the wake event. (also called Suspend to RAM) S4 - The S4 sleeping state is the lowest power, longest wake latency sleeping state supported by ACPI. In order to reduce power to a minimum, it is assumed that the hardware platform has powered off all devices. Platform context is maintained. (also called Suspend to Disk) S5 - The S5 state is similar to the S4 state except that the OS does not save any context. The system is in the "soft" off state and requires a complete boot when it wakes. Software uses a different state value to distinguish between the S5 state and the S4 state to allow for initial boot operations within the BIOS to distinguish whether or not the boot is going to wake from a saved memory image. 35