On 4/25/07, Till Straumann <[EMAIL PROTECTED]> wrote: > /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.
This is considerably better than an mbp c2d. If you don't set powerstate to the lowest state what do you get? Do your fans run at a higher speed than in OS X? On OS X now I'm at 18 W with wireless and a dim screen. This is around 3 hrs (though it goes up to 3.5+ hrs if I let make sure nothing is running in the background). If I could get 19-20 W in linux with the fans quiet that would be spectacular. What do you use to set the disk to rest - laptop mode? thanks, Sheer > > -- 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 > ------------------------------------------------------------------------- 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
