APM / ACPI Hibernat Question.

[RJK]

A couple of times a day at least, I hibernate my 2nd PC, and at the end of
the day I usually "Shut Down" XP Home ed. SP3+ and switch off my APC
Back-UPS 650 which supplies mains power to it - (leaving the mains power to
the UPS switched on btw). However, if I hibernate XP and then switch off
the UPS, (still leaving mains power to the UPS on), and then the next
morning switch on the UPS, the system box starts up the moment the UPS is
switched on. i.e. without me prodding the Pwr trigger button on the front
of the PC system box.

I can't see much in bios to adjust other than the "Resume / power up after
power loss" which is already set to "no," I haven't tried changing the bios
option which lists S1 | S3 etc.
....there is a "simple" signalling RS232 cable between the UPS and RS232 port
on the system box.
....the bios option "PS2 Keyboard power up" is not enabled.

Asus M3N78 (model without a "-??" suffix.)
PSU in there is Antec NeoPower 430 - UK

Any idea what I have to tweak so that I can switch on the UPS without the
system box powering up ?

TIA

regards, Richard

 

[Paul]

A couple of times a day at least, I hibernate my 2nd PC, and at the end of
the day I usually "Shut Down" XP Home ed. SP3+ and switch off my APC
Back-UPS 650 which supplies mains power to it - (leaving the mains power to
the UPS switched on btw). However, if I hibernate XP and then switch off
the UPS, (still leaving mains power to the UPS on), and then the next
morning switch on the UPS, the system box starts up the moment the UPS is
switched on. i.e. without me prodding the Pwr trigger button on the front
of the PC system box.

I can't see much in bios to adjust other than the "Resume / power up after
power loss" which is already set to "no," I haven't tried changing the bios
option which lists S1 | S3 etc.
...there is a "simple" signalling RS232 cable between the UPS and RS232 port
on the system box.
...the bios option "PS2 Keyboard power up" is not enabled.

Asus M3N78 (model without a "-??" suffix.)
PSU in there is Antec NeoPower 430 - UK

Any idea what I have to tweak so that I can switch on the UPS without the
system box powering up ?

TIA

regards, Richard

Is "Power On by Ring" Disabled ?

Ring (or RI) is a signal on the RS232 cable. Maybe the startup
causes RI to be asserted.

Ring Indication is a signal a modem would send over RS232, indicating
the dialup modem phone circuit was ringing. It is used for "answering
the phone", if another computer dials up your computer, via a modem
interface.

You can also test, by disconnecting the RS232 cable, then
switching on the UPS, and see if the motherboard starts
on its own or not.

The setting in the BIOS, "Power On by PCI/PCIE", would be part
of "Wake On LAN". Depending on the Device Manager setting for the
Ethernet NIC, if a waking event is specified there, the Power
On by PCI/PCIE may allow the NIC to wake the computer. Some
NICs support a wake on state change capability, such that any
activity on the Ethernet cable, wakes the computer. The NIC
asserts the PME signal, and "Power On by PCI/PCIE" is what
controls whether PME can wake the computer or not.

Paul

 

[RJK]

Is "Power On by Ring" Disabled ?

Ring (or RI) is a signal on the RS232 cable. Maybe the startup
causes RI to be asserted.

Ring Indication is a signal a modem would send over RS232, indicating
the dialup modem phone circuit was ringing. It is used for "answering
the phone", if another computer dials up your computer, via a modem
interface.

You can also test, by disconnecting the RS232 cable, then
switching on the UPS, and see if the motherboard starts
on its own or not.

The setting in the BIOS, "Power On by PCI/PCIE", would be part
of "Wake On LAN". Depending on the Device Manager setting for the
Ethernet NIC, if a waking event is specified there, the Power
On by PCI/PCIE may allow the NIC to wake the computer. Some
NICs support a wake on state change capability, such that any
activity on the Ethernet cable, wakes the computer. The NIC
asserts the PME signal, and "Power On by PCI/PCIE" is what
controls whether PME can wake the computer or not.

Paul

Many thanks, ...I disconnected RS232 "APC simple signaling" cable, and M3N78
still immiediately powered up - upon switching on APC 650 UPS.
....so now started wading through M3N78 user manual - bios "Power Menu"
options
Suspend Mode is set to [Auto]
[S1 (POS) Only] and [S3 Only] are the other two options.

ACPI 2.0 Support [Enabled] ...I notice that in the manual - the example is
[Disabled] ...perhpas that should be the default ?
....I'm off to try that !
.......that worked !!! ...i.e. setting ACPI 2.0 Support to [Disabled] seems
to have done the trick.
I "hibernated" the PC | switched off the APC 650 | waited a few seconds that
switched on the APC 650 ...and M3N78 did not start up

I've left "ACPI APIC Support" set to [Enabled]

i.e. ...it mavbe time to leave well enough - alone !

thanks again,

regards, Richard

 

[RJK]

....setting ACPI 2.0 Support to [Disabled] seems, to have done the trick.

i.e. I can now "hibernate" the PC and switch of the UPS, and later switch on
UPS and system box waits for me to press the Pwr button on the front of the
case.

many thanks,

regards, Richard

 

[Paul]

Many thanks, ...I disconnected RS232 "APC simple signaling" cable, and M3N78
still immiediately powered up - upon switching on APC 650 UPS.
...so now started wading through M3N78 user manual - bios "Power Menu"
options
Suspend Mode is set to [Auto]
[S1 (POS) Only] and [S3 Only] are the other two options.

ACPI 2.0 Support [Enabled] ...I notice that in the manual - the example is
[Disabled] ...perhpas that should be the default ?
...I'm off to try that !
......that worked !!! ...i.e. setting ACPI 2.0 Support to [Disabled] seems
to have done the trick.
I "hibernated" the PC | switched off the APC 650 | waited a few seconds that
switched on the APC 650 ...and M3N78 did not start up

I've left "ACPI APIC Support" set to [Enabled]

i.e. ...it mavbe time to leave well enough - alone !

thanks again,

regards, Richard

I suspect you're not going to be happy with doing that as a
permanent solution. Have you tried to shut down the PC, with
"ACPI 2.0 Support" [Disabled] ? You're going to bust a bunch
of stuff, if you aren't careful.

I think you should give Andy's idea a try, and look for other
device types that could be waking the computer. Such as a
network interface. Since removing the RS232 cable didn't fix
it, it probably isn't related to RI Ring Indication.

I would leave the ACPI setting, consistent with how it was when
the OS was installed. The HAL type is shown in Device Manager,
if you do "Properties" on the "Computer" entry. That probably
says ACPI and I would keep ACPI enabled in the BIOS. ACPI supports...

1) Suspend and Hibernate
2) Soft poweroff, when you select "Shut down" in Windows. Otherwise,
you would see the "It is safe to turn off your PC..." image at
shutdown, and have to use the switch to turn if off.
3) ACPI also helps features such as Cool N' Quiet to work.

Paul

 

[RJK]

...setting ACPI 2.0 Support to [Disabled] seems, to have done the trick.

i.e. I can now "hibernate" the PC and switch of the UPS, and later switch
on UPS and system box waits for me to press the Pwr button on the front of
the case.

I retract the above post ! Just came out here to my little office this
morning and hit the big button on the front of APC 650, and system box
immediately powered up !
....so I must remember to change "ACPI 2.0 Support [Disabled] back to
"enabled," bearing Pauls' advice in mind !
....so the two bios options
ACPI 2.0 Support
ACPI APIC Support
....will both be set to [Enabled]

....I get the impression that UPS has to be switched off for quite some time,
e.g. overnight, for the undesired Pwr up ! (note that I do leave the mains
supply to the UPS permanently on btw).

....so, as you suggested, just examined DM properties for motherboard
ethernet chip,
"NVIDIA nForce 10/100/1000 Mbps Networking Controller" :-
....there are 2 items on the Power Management tab:-
"Allow the computer to turn off this device to save power" | ...is currently
checked.
"Allow the computer to bring this device out of Standby" | ...is already
currently unchecked.
(...note that I do not use XP's "Standby," I only ever use Shut Down and
Hibernate)

Temptingly, "NVIDIA nForce 10/100/1000 Mbps Networking Controller"
properties | Advanced tab | Property :
....lists 13 options, the lowermost one is "WakeOnLAN from PowerOFF" |
currently enabled. ???
....I suspect that I should leave this setting alone ?

....possibly relevant is the settings for my UPS in XP | Power Options
Properties.
i.e. they are custom, and three "polarity" radio buttons are set to
positive. There is a "APC | Back-UPS" item in there - so I could select
that but, ages ago I think I selected that, and it produced incorrect UPS
behaviour, ...got stuck in a rebooting loop somewhere along the line, ..had
to hunt down information on the UPS. ...in any event it is correctly set
up, I think !!! i.e. Cut the mains pwr on the wall and the thing kicks in,
and also bleeps for 2 minutes, then it signals XP to Hibernate, then a relay
makes an click, and the UPS itself goes to standby.

....anyhow, it's surprising how quickly one becomes fed up with determining
"cause and effect" by "trial and error," mostly because each little test
involves gooness knows haow many reboots !

If I ever stumble on a solution, I'll post it. This is one of those little
quirks that one comes back to every week or so, to have another go !!!!

regards, Richard