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Archiver > TMG > 2003-06 > 1054873871


From: Dennis Lee Bieber <>
Subject: Re: [TMG] Comment on UPS
Date: Thu, 05 Jun 2003 21:31:11 -0700
References: <5.1.1.6.2.20030605131957.00a82ba0@mail.comcast.net><5.1.1.6.2.20030605232202.00a73410@mail.comcast.net>
In-Reply-To: <3EE00F1B.87D2F4A4@infoave.net>


On or about 20:48 06/05/03 a carrier pigeon from Richard Brogger delivered:

>much effect. While the UPS would provide an orderly shut down, the
>computer would still be off until someone started them again. One
>could come up with a way that they would start when power resumed but
>is it worth it?

Even my old Dell desktop could handle part of that -- the BIOS can
be set to handle restoration of power after a loss in three ways: stay off,
always boot, go to state at time of loss (IE, if the system was up when
power was lost, reboot; if it was off, stay off). I don't have a signalling
UPS however, so a clean shutdown can't be performed.

It appears the motherboard has a small circuit monitoring the
input to the power-supply, and if power appears at that point, it can turn
on the rest of the computer.

Using a UPS that can signal power-loss to the computer (triggering
a clean shut-down), with a BIOS option that is set to always boot when
power appears would get your wishes.

Other schemes are "wake on LAN", where the ethernet card can
power-up the computer when LAN traffic appears/

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