Intel® Server System S7000FC4UR TPS Operating System Boot, Sleep, and Wake
Revision 1.0
201
17.4 Sleep and Wake Support
17.4.1 System Sleep States
The server system supports these ACPI system sleep states:
ACPI S0 state – working state
ACPI S1 state – low latency sleep state
ACPI S4 state – hibernate
ACPI S5 state – soft-off state
The ACPI specification requires the system to support at least one sleep state. S1 is considered
a sleep state. The S5 state is equivalent to operating system shutdown. No system context is
saved when going into S5.
17.4.2 Supported Wake Events
The ACPI operating system controls the system wake policy. The role of the BIOS is limited to
describing the supported wake devices to the operating system via the ASL code in the
Differentiated System Description Table (DSDT). The BIOS has no direct control over the
wakeup sources when an ACPI operating system is loaded.
17.4.2.1 Supported Wake Devices
The hardware and BIOS supports these wake devices in the ACPI environment:
USB devices including USB mice and keyboards connected to any port can wake the
system from the S1 sleep state.
The Serial Port B can be configured to wake the system from the S1, S4 or S5 sleep
states.
PCI cards, such as LAN cards, can wake the system from the S1, S4 or S5 sleep states.
The PCI card must have the necessary hardware and be configured correctly for this to
work.
As required by the ACPI specification, the power button can wake the system from all
supported sleep states.
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