Date: Wed, 29 Aug 2001 21:10:12 -0700 (PDT) From: Doug Ambrisko <ambrisko@ambrisko.com> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: current@FreeBSD.ORG Subject: Re: HEADS UP: ACPI CHANGES AFFECTING MOST -CURRENT USERS Message-ID: <200108300410.f7U4ACi41489@ambrisko.com> In-Reply-To: <Pine.NEB.3.96L.1010829232558.76541C-100000@fledge.watson.org> "from Robert Watson at Aug 29, 2001 11:26:50 pm"
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Robert Watson writes: | On Wed, 29 Aug 2001, Garrett Wollman wrote: | > <<On Wed, 29 Aug 2001 19:58:59 -0700, Mike Smith <msmith@FreeBSD.ORG> said: | > > - I pushed the power button, and my system shut down cleanly! | > | > > Yes. ACPI brings some useful new features. 8) | > | > FSVO ``useful''. It's a real PITA to have to physically unplug the | > machine when the kernel is wedged rather than have the power button | > turn off the power. (The machine in question does not have a reset | > switch.) As a sometime developer, I may well have a reason to power | > the system off without performing any kind of shutdown. | | Most systems with soft power will perform a hard powerdown if you hold | down the power button for a sufficiently long period of time (10 - 20 | seconds). Correct ... and unfortunately it's done in hardware so you can trap it :-( In some applications you want to make it really hard for someone to be able to turn it off when a "power off" is not equivalent to "pull the plug" and the "pull the plug" is safer for the system due to power supply design. Doug A. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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