Re: Sleep Mode Takes 100 Watts More Since Monitor Change?

And where does one find dumppo.exe?


Paul wrote:
(PeteCresswell) wrote:
P4P800E-Deluxe.

Power consumption used to drop from 200+ to near zero when it went into sleep
mode. That was with a CRT monitor.

Swapped the CRT out for a SONY LCD.

Seemingly coincident (not 100% sure) with the swap, sleep mode has started
eating more like 100 watts.

Also, I think there's a fan running that used to shut down in sleep mode. Power supply?

Anybody got any ideas?

If the fans run and the power stays high like that, you are in ACPI
state S1. S1 turns off the video card output (so the monitor will sleep),
but leaves the processor running, and all power supply voltages are
still present.

The (near zero) state you were in, was S3 Suspend To RAM. In Suspend To RAM,
the main PSU rails are switched off. The PSU fan stops. Only the +5VSB power
is still present (which lights the green LED on the motherboard). The +5VSB
powers the DRAM refresh circuit and the DRAM itself. The RAM contents are
saved. All PCI/AGP/PCI Express cards are powered off. The processor is
powered off. When the machine wakes up, the OS does a "mini-reload" and
all the hardware drivers have to reload appropriate settings into the
peripheral chips, PCI cards etc. So that is S3 state.

It means that the addition of your monitor, has upset ACPI.

To investigate what ACPI states are currently supported, you can use
the Microsoft (DOS window) utility called "dumppo.exe".

When adding a monitor, you should look for a monitor driver. When I
added a NEC1765 to my system, I got a ZIP package from the NEC-Mitsubichi
web site. It had NL1765.INF in it, plus a couple other files. You install
that as a "display driver". Without it, if you go into your Display Control
Panel for your video card, the monitor will be marked as "Generic". Now,
I don't see from a hardware perspective, why that should matter for ACPI,
but it is one little detail you can experiment with. Otherwise, I don't know
how to explain the loss of S3 as an available state.

Paul
.