Date: Tue, 22 May 2001 13:21:14 -0700 (PDT) From: Doug White <dwhite@resnet.uoregon.edu> To: <ggm@apnic.net> Cc: <freebsd-mobile@FreeBSD.ORG> Subject: Re: power saving/power usage Message-ID: <Pine.BSF.4.33.0105221319590.66224-100000@resnet.uoregon.edu> In-Reply-To: <200105140510.PAA04880@hadrian.staff.apnic.net>
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On Mon, 14 May 2001 ggm@apnic.net wrote: > > Can somebody give me brief summary on how FreeBSD > interacts with so-called power-saving feature-ettes > on laptops? > > I am suspecting that I get less (apparent) time per > battery charge on UNIX than on Windeath. I am also > suspecting this is because you have to actively frob > the CPU to tell it to [drop clock|drop volts|slow down] > etc. Yes -- FreeBSD does not currently implement processor cycling or any other OS-controlled power saving features, for the most part. You can suspend/resume and sometimes trick the disk into spinning down, but that's about it. -CURRENT has ACPI support so we'll have a daemon that can at least turn off the fans and so forth. Doug White | FreeBSD: The Power to Serve dwhite@resnet.uoregon.edu | www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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