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Tim Reid
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      05-13-2004, 05:37 PM
I have a P4P800 that is going into suspend mode. I would like to stop this.
I have turned off all power management in the OS(2003 server). Under Power
in BIOS setup there is Suspend Mode with options Auto, S1 (POS) only, S3
only. I have no idea what S1 or S3 mean and the manual says nothing. What
settings should I use to prevent Suspend mode?
Thank you.


 
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Paul
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      05-14-2004, 04:14 AM
In article <HnOoc.66816$(E-Mail Removed)> , "Tim Reid"
<(E-Mail Removed)> wrote:

> I have a P4P800 that is going into suspend mode. I would like to stop this.
> I have turned off all power management in the OS(2003 server). Under Power
> in BIOS setup there is Suspend Mode with options Auto, S1 (POS) only, S3
> only. I have no idea what S1 or S3 mean and the manual says nothing. What
> settings should I use to prevent Suspend mode?
> Thank you.


A quick search on Altavista, using Hibernate and Suspend, got me
this article:

http://www.informationweek.com/story/IWK20020927S0028

S0 Full power (normal operating mode)
S1 Hard drive and monitor shut down when not used
S2 Same as S1, but CPU is also shut off. Equiv to S3,
so you may not see S2 mentioned anywhere.
S3 Same as S2, and called Suspend to Ram (STR) or Sleep.
RAM contents valid. CPU shut off. +5VSB powers the RAM.
S4 Same as S3, only content of ram are written to disk.
Called Hibernate. No power is needed in this state.
On reboot, restores the ram from the image stored on disk.
S5 All power off. Full reboot needed ? +5VSB still powers
the same circuits powered by the CMOS battery, only the
battery is not being drained as long as +5VSB is running.
Flipping the switch to OFF on the back of the computer,
causes the CMOS to use the coin cell for power, to keep
time/date.

Personally, I think you need to solve this from the Windows end.
Butchering ACPI support features, by turning them off in the BIOS,
really should not be necessary.

There are a couple of ways a computer can decide to change power
states. An inactivity timer is one method, where the machine
suspends or hibernates, after a period of up to three hours
has passed. You set the time in some Windows control panel or
applet.

There is also a Scheduler for Windows. You can specify times
that you want the machine to do something, and hardware support
for this is provided by the CMOS clock and the alarm clock
built into it. If you haven't been using a function like this,
it is not likely to be doing anything to you on its own.

I would start by searching Google or the MS KB, using terms like
Suspend/Hibernate Power Management ACPI and so on, to see if you
can get a hint as to what is triggering the state change. Usually
a problem like this is related to that inactivity timer I referred
to above. Setting it to "Never" should be working for you.

A problem I've never managed to solve, is I've had disk drives
that decided to spin down on their own, even though the Windows
controls were set to "Never". I think it is possible that disk
drives have their own power management policies, that can be
programmed by using a special utility downloaded from a disk
manufacturer's web site. In fact, a full featured utility from
Vendor "A" can be used to program the features on a Vendor "B"
drive, because all of these features should be standardised in
the ATA/ATAPI specs. I think some drives have an option to
behave like a laptop drive, where they stop spinning after
a period of inactivity.

HTH,
Paul
 
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