Eric wrote:
> For XP with SP3, I have tried sleep mode, but the fan and power for my PC are
> still on, I would like to suspend XP, which the fan and power will be off.
> Does anyone have any suggestions on how to suspend XP without exiting window?
> Thanks in advance for any suggestions
> Eric
First, start in the BIOS setup screens. On my motherboards here,
there are options for S1, S3, S1&S3 for Standby. S1 Standby leaves
the fans running (what you've got now). S3 Standby Suspend To RAM
turns the fans off and saves the session in RAM.
For S3 Standby to work, the switch on the back of the computer must
remain in the ON position. The +5VSB supply rail on the supply
continues to run. The +5VSB is used as a power source, to keep
the RAM refreshed in S3 Standby.
To wake a computer, there is a section of the BIOS controlling
waking events. For example, there might be "Wake on Ring", used
with the RS-232 Serial port, to wake a computer when a connected
dialup modem detects the ringing signal. There will be a BIOS
page, populated with options like that.
Once you've enabled whatever waking features are needed in the
BIOS, the next step is to visit Device Manager. There are options
on selected hardware devices in there, to do things like
"Allow this device to bring the computer out of standby".
That is part of getting a "Wake Up" feature to work.
For a peripheral to wake the computer from S3 Standby, the
peripheral must be powered. If I expected my USB keyboard
to wake the computer, the keyboard would need to be
powered from +5VSB. On newer computers, that may be the only
powering choice. On older computers, jumper plugs may be
present on the motherboard surface, for selecting +5V or +5VSB.
Selecting the +5V, prevents a peripheral from ever waking up the
computer from S3 Standby. I used that feature, to prevent nuisance
waking from say, a little vibration shaking a USB mouse.
In your current situation, you may not have enabled S3 Standby
in the BIOS. To repair the damage, Microsoft makes a 12KB utility
called "dumppo.exe". It can be used to do an "Administrative Override"
and correct the Standby setting in Windows. Once done, you'll then
be able to make the computer sleep, with the fans off.
(Last known location of "dumppo")
ftp://ftp.microsoft.com/Products/Oemtest/v1.1/WOSTest/Tools/Acpi/dumppo.exe
Not all devices can wake a computer. For example, if you have
a wireless USB mouse and keyboard, the ability to wake the
system will rely on the USB receiver dongle plugged into the
computer. If it has one of those "Allow this device..." entries
in its Device Manager properties, then it may support waking.
The dongle must remain powered by +5VSB, for that to work.
Some computers are not completely stable in S3 Standby. My previous
Asrock motherboard, would fail to wake up from S3, about one in four attempts.
All the Intel chipset based motherboards I've used, have functioned
perfectly in that regard. If you have trouble with S3 Standby, then
switch to S4 Hibernate, as that is a much safer alternative, and
it is safe against power interruptions.
With S3 Standby, a UPS is recommended, to prevent one second power
outages from killing your session stored in RAM. If the power outage
is long enough, then the UPS will run out of juice, and the current
session in RAM will be lost. S4 Hibernate can survive such power issues,
because the session is stored on the hard drive.
Paul