Fighting for the power.
mav at FreeBSD.org
Mon May 4 03:45:15 UTC 2009
Adam McDougall wrote:
> 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"
Yes, backlight is also important. But there is not so much things could
When I am leaving system for some time, I can just close the lid, if not
put system into S3 state, which require very small power (at least I was
unable to really measure it without all-day-long testing). Thanks to
jkim@ we have more or less working S3 state for amd64 now.
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