Date: Sat, 01 Dec 2007 13:08:09 -0500 From: Jessica Mahoney <root@varusonline.com> To: Darren Pilgrim <freebsd@bitfreak.org> Cc: freebsd-advocacy@freebsd.org Subject: Re: [Laptop] Battery Time Message-ID: <4751A309.3040206@varusonline.com> In-Reply-To: <47518B5D.1040105@bitfreak.org> References: <474E80CD.3020803@varusonline.com> <47518B5D.1040105@bitfreak.org>
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Darren Pilgrim wrote: > Jessica Mahoney wrote: >> Quick recap: >> Windows Vista: 2 minute boot, 90 minutes of battery > > What tuning did you do on Vista prior to your measurements? A stock > Vista install never actually goes idle, so it eats the battery life. > > With FreeBSD if you run X with an alpha-blending WM and a background > process to continually keep the CPU 10-20% loaded and the disk active, > you also get poor battery life. > > Vista, when properly tuned, will get better battery life than Vista > because it can also turn off devices to save power. FreeBSD lacks the > ability to power down USB, wireless and wired net devices, CD/DVD > drives, etc. > I had enabled everything in the Power Management panel in Vista (six dots for Power Saving, no dots for Performance), and had the flat panel at its dimmest setting. With FreeBSD, I had the panel at its dimmest setting, average CPU load 2-5%, and had the CPU running at 800MHz. I have no idea what the CPU clock was while running Vista, since there doesn't seem to be a CPU clock monitor in Vista.
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