Congatec COM Express conga-B915 User Manual page 35

The following table lists the "Wake Events" that resume the system from both S1 or S3 unless otherwise stated in the "Conditions/Remarks"
column:
Wake Event
Power Button
Onboard LAN Event
SMBALERT#
PCI Express WAKE#
PME#
USB Mouse/Keyboard
Event
RTC Alarm
Watchdog Power
Button Event
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.
Copyright © 2008 congatec AG
Conditions/Remarks
Wakes unconditionally from S1-S5.
Device driver must be configured for Wake On LAN support.
Wakes unconditionally from S1-S5.
Wakes unconditionally from S1-S3.
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.
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.
Activate and configure Resume On RTC Alarm in the Power setup menu.
Wakes unconditionally from S1-S5.
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