Date: Thu, 06 May 2004 08:18:02 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: scottl@freebsd.org Cc: nate@root.org Subject: Re: cvs commit: src/sys/dev/acpica/Osd OsdSynch.c src/sys/i386/include acpica_machdep.h src/sys/ia64/include acpica_machdep.h src/sys/amd64/include acpica_machdep.h Message-ID: <20040506.081802.90997618.imp@bsdimp.com> In-Reply-To: <4099FE31.9020802@freebsd.org> References: <20040506011323.C39605@root.org> <20040506034307.M811@odysseus.silby.com> <4099FE31.9020802@freebsd.org>
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In message: <4099FE31.9020802@freebsd.org>
Scott Long <scottl@FreeBSD.org> writes:
: I've found that the best way to extend battery life on a laptop is to
: turn down the display brightness as low as possible. CPU throttling,
: PCI power states, etc, make a small (but measurable) difference on my
: P4-M laptop, but the real win comes from turning down the brightness.
My Sony has similar effects, but throttling down the CPU from 8 to 2
increases my battery life from about 3 hours to 4 hours. Dim LCD has
a similar effect. Turning off the unused PCI devices gives a dozen
more minutes.
Warner
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