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6.4
ACPI Suspend Modes and Resume Events
conga-TCA supports S3 (STR= Suspend to RAM). For more information about S3 wake events see section 9.4.5 “ACPI Submenu”.
S4 (Suspend to Disk) is not supported by the BIOS (S4_BIOS) but it is supported by the following operating systems (S4_OS= Hibernate):
•
Windows 7, Windows Vista, Linux, Windows XP and Windows 2K
This table lists the “Wake Events” that resume the system from S3 unless otherwise stated in the “Conditions/Remarks” column:
Wake Event
Conditions/Remarks
Power Button
Wakes unconditionally from S3-S5.
Onboard LAN Event
Device driver must be configured for Wake On LAN support.
SMBALERT#
Wakes unconditionally from S3-S5.
PCI Express WAKE#
Wakes unconditionally from S3-S5.
USB Mouse/Keyboard 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 (if setup node is available in BIOS setup program).
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. Only available in S5.
Watchdog Power Button Event
Wakes unconditionally from S3-S5.
