Wake Event
Conditions/Remarks
PME#
Activate the wake up capabilities of a PCI device using Windows Device Manager
configuration options for this device OR set Resume On PME# to Enabled in the Power setup
menu.
USB Mouse/Keyboard
Event
When Standby mode is set to S1, no special action must be taken for a USB Mouse/Keyboard
Event to be used as a Wake Event.
When Standby mode is set to S3, the following must be done for a USB Mouse/Keyboard
Event to be used as a Wake Event..
USB Hardware must be powered by standby power source.
Set USB Device Wakeup from S3/S4 to ENABLED in the ACPI setup menu.
Under Windows XP add following registry entries:
Add this key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\usb
Under this key add the following value:
„USBBIOSx“=DWORD:00000000
Note that Windows XP disables USB wakeup from S3, so this entry has to be added to re-
enable it.
Configure USB keyboard/mouse to be able to wake up the system:
In Device Manager look for the keyboard/mouse devices. Go to the Power Management tab
and check 'Allow this device to bring the computer out of standby'.
Note: When the standby state is set to S3 in the ACPI setup menu, the power management
tab for USB keyboard /mouse devices only becomes available after adding the above registry
entry and rebooting to allow the registry changes to take affect.
RTC Alarm
Activate and configure Resume On RTC Alarm in the Power setup menu.
Watchdog Power
Button Event
Wakes unconditionally from S1-S5.
PS/2 Mouse/Keyboard
Event
Only can be used as a Wake Event when in S1 mode.
Note
The above list has been verified using a Windows XP SP2 ACPI enabled installation.
When using Windows XP, Standby mode is either an S1 state or S3 state depending on
what has been selected in the ACPI Configuration Menu in the BIOS setup program.
For more information about this see section 9.4.1 of this document.
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