> On a different note, one test we might think about running is the > closest thing the industry has to a "standard" battery life test. It's > specified on a lot of the netbook specs. > > It's defined here: http://it.jeita.or.jp/mobile/e/index.html > > However, I'm also seeing that a lot of vendors are choosing not to use > this test because it generally results in a number higher than what the > typical user will actually get.
I looked it over. Companies report the average of two measurements: The hours of power available when the machine is dialed down to minimum power, screen at its very dimmest (reflective mode for us), doing nothing, everything disabled. And the other measurement is when the system is playing back an MPEG movie, in a small window and with relatively standard OS and display settings. (We can't do this out of the box, but we could install an MPEG codec for the test, and run it that way. Or transcode their test movie to Ogg Theora and try that for simplified release testing, until we have to report an official number using MPEG.) It would be useful for us to measure and improve the numbers in both of those modes -- but the average will be highly misleading to everyone. Still, it would provide a comparison to netbooks and other computers. It would be nice if our runtime in the minimum power mode could in 9.1.0 be almost equal to our "lid-closed suspend time", which I measured in #7879 to be 8 hours with mesh/wifi chip on, and 44+ hours with the mesh/wifi off. Actually, it won't be that good, because the test requires that the screen remain on (perhaps consuming 0.5W), though the reflective screen means we can turn off the backlight. So perhaps we'll get 16 to 20 hours in that mode. If so, averaging with perhaps 2 to 4 hours of active runtime, for a total "standard" number of about 10 to 12 hours would still be pretty good by comparison to typical netbook products. [First we'll have to fix a bunch of bugs...] John _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel