On Wed, 2005-03-09 at 15:26 +0100, Moritz Muehlenhoff wrote: > Hi, > I'm using an IBM Thinkpad X31. With stock 2.6.11 and the additional > radeontool to power-off the backlight in suspend, S3 works very well > and reliable. During S3 I've measured a power consumption of 1400 > to 1500 mWh (using 512 megabytes of RAM). Is there still room for > optimization? What's the typical amount of energy required for suspend- > to-ram? From friends using iBooks with MacOS X I've heard that they > left the notebook in suspend when leaving for a week and could still > use it after return.
I also have an X31 and I noticed that the e1000 has Wake-On-Lan enabled by default and the S3 code doesn't disable that (kind of defeats the purpose :) Disabling that will make the e1000 driver power down the chip during S3. ethtool -s ethX wol d I don't know if you have the e1000 or e100 in your machine, but I think the e100 driver does the same. I've had mine suspended for 2-3 days at most, actually havn't left it alone for longer than that in S3 so I'm not really sure how much power it consumes, but I'd say it's 1-2 percent of the total capacity per hour, so somewhere below 1000mW. I also use the standard radeontool to disable the backlight, I'll test the version Matthew pointed out some day. -- /Martin
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