GL815E Endura Motherboard Product Manual
Page 22 of 51
2.15 Power management
The GL8"5E motherboard implements a number of power management features with software
support for APM and ACPI. Where an operating system does not support ACPI, the motherboard
defaults to using APM. An APM driver is required by the operating system in order to take
advantage of the APM power management features.
2.15.1 ACPI Power States
An ACPI-aware operating system directs the power management of the motherboard – causing the
various devices within the system to change power state as appropriate. The table below describes
the ACPI power states available using the GL8"5E motherboard.
Global State Sleep State Device
State
Description
G0 S0 C0, D0 Fully operational, all devices powered.
G"
Sleeping
S"
CPU stopped
C", D",
D2, D3
Sleep state. CPU is stopped but all devices are
powered.
G"
Sleeping
S4
Suspend to disk
D3 All devices are unpowered except wake-up
logic. Memory and system context saved to disk.
G2/S5 S5
Soft Off
D3
All devices are unpowered. Memory contents
and context are lost. No wake-up possible.
G3
Mechanical Off
No power No power System is unpowered with no standby rails. No
wake-up is possible
2.15.2 ACPI Wake-up Support
The table below indicates which events can cause an ACPI wake-up and from which sleep states.
Event Sleep State Comment
Power switch S", S4, S5
RTC alarm S", S4
PS/2 keyboard or mouse S" Ports are unpowered in S4, S5
USB device (any port) S" Ports are unpowered in S4, S5
On-board LAN (82559ER) S", S4 Restricted wake-up support. Magic Packet is NOT
supported.
IR device S"
PCI PME signal S", S4
