Sleep To On (Acpi); System Sleep States; Table 44: Supported Wake Events - Intel SE7520JR2 Technical Manual

Intel® Server Board SE7520JR2
4.9.2.6

Sleep to On (ACPI)

If an operating system is loaded, the sleep button generates a wake event to the ACPI chipset
and a request (via SCI) to the OS to place the system in the "On" state. The OS retains control
of the system and OS policy determines what sleep state (if any) and sleep sources the system
can wake from.
4.9.2.7

System Sleep States

The platform supports the following ACPI System Sleep States:
•
ACPI S0 (working) state
• ACPI S1 (sleep) state
•
ACPI S4 (suspend to disk) state
• ACPI S5 (soft-off) state
The platform supports the following wake up sources in an ACPI environment. As noted above,
the OS controls the enabling and disabling of these wake sources.
• Devices that are connected to all USB ports, such as USB mice and keyboards can wake
the system up from the S1 sleep state.
• PS/2 keyboards and mice can wake up the system from the S1 sleep state.
•
Both serial ports can be configured to wake up the system from the S1 sleep state.
• PCI cards, such as LAN cards, can wake up the system from the S1 or S4 sleep state.
Note that the PCI card must have the necessary hardware for this to work.
• As required by the ACPI Specification, the power button can always wake up the system
from the S1 or S4 state.
2.
Additionally, if an ACPI operating system is loaded, the following can cause the system to wake
up: the PME, RTC, or Wake-On-LAN.
Wake Event
Power Button
Ring indicate from Serial A
Ring indicate from Serial B
PME from PCI cards
RTC Alarm
Mouse
Keyboard
USB
Revision 1.0

Table 44: Supported Wake Events

Supported via ACPI (by sleep state)
Always wakes system.
Wakes from S1 and S4.
Wakes from S1 and S4. If Serial-B (COM2) is used for
Emergency Management Port, Serial-B wakeup is
disabled.
Wakes from S1 and S4.
Wakes from S1. Always wakes the system up from S4.
Wakes from S1.
Wakes from S1.
Wakes from S1.
C78844-002
System BIOS
Supported
Via Legacy
Wake
Always
wakes
system
Yes
Yes
Yes
No
No
No
No
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