Hi Sven, I asked about the MacBook issue in a previous post somewhere. I've also become convinced that the problem is the GPU (there was an article I mentioned on Phoronix where someone compared the temperature of the GPU of an ATI card in Linux and windows and found it much higher in the former). Regarding the MacBook, here's a webpage claiming a 3 hour battery life under linux:
http://desrt.mcmaster.ca/macbook.xhtml http://bbs.archlinux.org/viewtopic.php?id=22960 The second link has a bit of discussion about battery life under Linux on the MB. I don't know what the OS X battery life is but I'm guessing its at least 4 hours (people there say 3-4 hrs). I agree that looking into this is the right approach. If the GPU is the problem there's very little we can do about it but wait for ATI so we might as well find out if this is the case. Hopefully somebody from the list can post some specific MB stats. It would also be good to see if its possible to get the MB battery life up to its OS X value using USB autosuspend and dynticks. cheers, Sheer On 4/24/07, Sven Anders <[EMAIL PROTECTED]> 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. > > 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... > > Any comments to these thoughts? Any errors in it? > > > Best regards > Sven > > -- > Sven Anders <[EMAIL PROTECTED]> () Ascii Ribbon Campaign > /\ Support plain text > e-mail > ANDURAS service solutions AG > Innstraße 71 - 94036 Passau - Germany > Web: www.anduras.de - Tel: +49 (0)851-4 90 50-0 - Fax: +49 (0)851-4 90 > 50-55 > > Rechtsform: Aktiengesellschaft - Sitz: Passau - Amtsgericht Passau HRB 6032 > Mitglieder des Vorstands: Sven Anders, Marcus Junker > Vorsitzender des Aufsichtsrats: Dipl. Kfm. Thomas Träger > ------------------------------------------------------------------------- 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
