Date: Sat, 1 May 2004 17:01:30 -0400 From: Bob Johnson <bob89@bobj.org> To: freebsd-mobile@freebsd.org Cc: Markie <mark.cullen@dsl.pipex.com> Subject: Re: Laptop ACPI question Message-ID: <200405011701.31008.bob89@bobj.org> In-Reply-To: <003001c42fbb$11ce5060$f700000a@ape> References: <003001c42fbb$11ce5060$f700000a@ape>
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On Saturday 01 May 2004 04:29 pm, Markie <"Markie" <mark.cullen@dsl.pipex.com>> wrote: > Hello, > > Just a quick question... would having ACPI working on a laptop > increase battery life at all? I just left it sat idle without ACPI > and it got to an hour and 30 minutes... I went to start xchat and it > just switched off straight away after it started loading :o) if I > leave it doing `cat /dev/random > /dev/null` it only lasts 45 minutes > :o( > I don't know what the FreeBSD ACPI system can do for you, so I can't answer that part of your question, but: FreeBSD halts the processor when it is not doing anything, so when you are copying /dev/random it should use more power than when it is doing nothing. > I am just wondering if it's a naffed battery... or... there's > something a bit wrong with the laptop or... I just need ACPI? I don't > really know what ACPI does, so.... :o) Many laptops allow you to set the processor to run slower when on battery power than when on AC power: if your BIOS has a setting for this, it might improve your battery life. I suspect your battery is getting weak in any case. > > Thanks! Sorry I didn't have more info. Maybe someone else will. - Bob
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