/I can confirm your report (mbp, c1d here) - I also found similar results (~17-18W) under osx. On linux I get down to 20-21W (low brighness, disk at rest, CPU freq at 1GHz, ati powerstate=1) but I found that unloading the 'uvcvideo' driver (isight) seems to save almost another ~1W or so - I'm at 19-20W right now.
-- Till PS I still have the wireless up; shutting it down probably saves also some power. / Soeren Sonnenburg wrote: > On Tue, 2007-04-24 at 08:10 +0200, Sven Anders wrote: > >> Hello! >> >> I thought about the power consumption. Maybe we can track the problem down >> some other way... >> >> 1. Is the output of '/proc/acpi/battery/BAT0/state' reliable? If it is, >> we can use it for testing, otherwise we have to test how long the battery >> really lasts. >> > > well at least the predicted time matched very well the time when the mbp > went out of batteries and as that time is based on powerconsumption > estimates in /proc/*/BAT0/state I would tend to say it is OK. > > >> 2. As far as I remember, the MacBook is very similar to the MacBook Pro in >> the hardware it's using. The main difference is the GPU. >> How long does the battery of the MacBook under Linux last in comparison to >> MacOS X? >> If it's a small difference, so our problem is the power consumption of >> the ATI GPU (assuming the Intel-GPU draws as less power under Linux as it >> does under MacOSX). On the MacBook we have the advantage, that it's an >> open-source driver. >> If the power drain is as bad as on the MacBook Pro (and we checked the >> Intel-GPU driver, that is's using all power-saving states available), >> the problem lies somewhere else... >> >> To check these, we need some output of the MacBook's /proc/acpi values or >> somebody who helps us to prove these theory... >> > > well I am using a mbp c1d and it eats about 27W with everything on + > full brightness. as you know powerplay is supported on this book, > aticonfig --set-powerstate=1 (low power mode) gives me 1-2W less boiling > down to 25-26W or max. 10 extra minutes (*), if you further set > display-brightness to the lowest level it goes down to 21-22W and > backlight off still has 20W. > > In OSX I get 23.8W (=2h 18min) with everything on and 18.5W (=2h 58min) > with everything off+low brightness > > so we are looking for reasons (I don't expect it to be a single one) > that explain a gap of ~4W ... which seems a lot considering that this is > essentially what the display at full brightness eats up but still may > not be as big as we expected. > > Soeren > > (*): this assumes that your battery can be charged to 55Wh mine after > half a year of intensive usage is already down to 35Wh > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Mactel-linux-devel mailing list > Mactel-linux-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mactel-linux-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Mactel-linux-devel mailing list Mactel-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mactel-linux-devel
