P4P800 Deluxe - no returning to LAST STATE after power restored?

[trooper2]

Ran into a strange issue where my P4P800 Deluxe system is not
correctly returning to the last system state after a power
outage/surge where power is restored. Rather the green power light is
illuminated on the motherboard but pressing the on button in front of
case does nothing. To return system to previous powered-on state, I
have to manually kill the master power to power supply, wait until
green motherboard power light turns off then turn master power supply
power back to ON. Once I do this, the system begins to boot up
immediately.

Has anyone seen this that can recommend how I can correct? Thanks in
advance.

 

[Paul]

Ran into a strange issue where my P4P800 Deluxe system is not
correctly returning to the last system state after a power
outage/surge where power is restored. Rather the green power light is
illuminated on the motherboard but pressing the on button in front of
case does nothing. To return system to previous powered-on state, I
have to manually kill the master power to power supply, wait until
green motherboard power light turns off then turn master power supply
power back to ON. Once I do this, the system begins to boot up
immediately.

Has anyone seen this that can recommend how I can correct? Thanks in
advance.

For technical background, see the ICH5/ICH5R datasheet. This is the
one I use:

Section 5.13.7.4 "Handling Power Failures" Pg. 154
http://developer.intel.com/design/chipsets/datashts/25251601.pdf

As you suggest, the power button is supposed to be a wake up source,
but only if power button status (PWRBTN_STS) works properly.

Unless this is another one of those issues with ACPI not being
tuned up properly, (i.e. use dumppo.exe), I'd say maybe you
have a very slight fault in your Southbridge. Try using dumppo.exe,
to see whether ACPI is supported and enabled on your motherboard.
Check for any settings in the BIOS for ACPI, make sure your OS
install uses a HAL that supports ACPI, then get a copy of dumppo:

ftp://ftp.microsoft.com/Products/Oemtest/v1.1/WOSTest/Tools/Acpi/dumppo.exe

If you cannot make any progress that way, do a warranty return (RMA).

Just some guesses,
Paul