Date: Sun, 3 May 2009 21:14:21 -0400 From: Adam McDougall <mcdouga9@egr.msu.edu> To: Alexander Motin <mav@FreeBSD.org> Cc: FreeBSD acpi <freebsd-acpi@freebsd.org>, FreeBSD-Current <freebsd-current@freebsd.org>, freebsd-mobile@freebsd.org Subject: Re: Fighting for the power. Message-ID: <20090504011421.GI6901@egr.msu.edu> In-Reply-To: <49FE1826.4060000@FreeBSD.org> References: <49FE1826.4060000@FreeBSD.org>
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On Mon, May 04, 2009 at 01:18:14AM +0300, Alexander Motin wrote: I would like to summarize some of my knowledge on reducing FreeBSD power consumption and describe some new things I have recently implemented in 8-CURRENT. The main character of this story is my 12" Acer TravelMate 6292 laptop with C2D T7700 2.4GHz CPU, 965GM chipset and SATA HDD, under amd64 8-CURRENT. Great list! May I suggest screen brightness and DPMS as another tool to save power, I've measured a 5W difference from the screen draw. Keeping the brightness as low as tolerable helps considerably, but also using 'xset dpms 120 120 120' (modify to taste) in .xinitrc to turn off the screen after 2 minutes helps when the laptop isn't being used every second. May need this in xorg.conf: Option "dpms"
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