From owner-freebsd-current Wed Aug 29 21:57:40 2001 Delivered-To: freebsd-current@freebsd.org Received: from peter3.wemm.org (c1315225-a.plstn1.sfba.home.com [24.14.150.180]) by hub.freebsd.org (Postfix) with ESMTP id CA60337B403; Wed, 29 Aug 2001 21:57:31 -0700 (PDT) (envelope-from peter@wemm.org) Received: from overcee.netplex.com.au (overcee.wemm.org [10.0.0.3]) by peter3.wemm.org (8.11.0/8.11.0) with ESMTP id f7U4v4M13083; Wed, 29 Aug 2001 21:57:04 -0700 (PDT) (envelope-from peter@wemm.org) Received: from wemm.org (localhost [127.0.0.1]) by overcee.netplex.com.au (Postfix) with ESMTP id 3660B3807; Wed, 29 Aug 2001 21:57:04 -0700 (PDT) (envelope-from peter@wemm.org) X-Mailer: exmh version 2.3.1 01/18/2001 with nmh-1.0.4 To: Doug Ambrisko Cc: Robert Watson , current@FreeBSD.ORG Subject: Re: HEADS UP: ACPI CHANGES AFFECTING MOST -CURRENT USERS In-Reply-To: <200108300410.f7U4ACi41489@ambrisko.com> Date: Wed, 29 Aug 2001 21:57:04 -0700 From: Peter Wemm Message-Id: <20010830045704.3660B3807@overcee.netplex.com.au> Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Doug Ambrisko wrote: > Robert Watson writes: > | On Wed, 29 Aug 2001, Garrett Wollman wrote: > | > < sai d: > | > > - 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. Most systems have a 4-second override so that holding down the power button for 4 seconds forces it off. However, my vaio is not one of these. I've had the joy of having to unplug the power and then remove the battery to get out of an acpi wedge. Anyway, IMHO, this is the least of our problems. Cheers, -Peter -- Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message