Re: [Mactel-linux-users] macbook battery life.

[Miguel F. M. S. F. <mig...@gm...>]

Hi,
there are known "efficiency" problems in linux power consumption, see
this paper about that:
http://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/doc/OLS2006-bltk-paper.pdf


On 11/7/06, Thomas Perl <th...@pe...> wrote:
> Hallo, Davide!
>
> On Tue, 07 Nov 2006 13:54:04 +0100 Davide Bertola wrote:
> > I have a macbook and I get about 2 hours of battery life.
> >
> > [...]
> >
> > Compared to OSX the battery should be charged to 50 W, not only 38 W.

how do get your 50W numbers on OSX ?

It would be interesting to dwelve on that if your 12W diference is confirmed.

> > And minimum power discharge rate should be about 13 W, against 18W.
> >
> > I'd like to know about your parameters (measured as I did) and battery
> > life.
>
> on AC power:
>
> thp@macbook:~$ cat /proc/acpi/battery/BAT0/state
> present:                 yes
> capacity state:          ok
> charging state:          charged
> present rate:            0 mW
> remaining capacity:      52090 mWh
> present voltage:         12533 mV
>
> Just after AC power disconnected, bright screen, OGG playback, different
> applications and so on -- in general, a "desktop situation":
>
> thp@macbook:~$ cat /proc/acpi/battery/BAT0/state
> present:                 yes
> capacity state:          ok
> charging state:          discharging
> present rate:            20294 mW
> remaining capacity:      52110 mWh
> present voltage:         12382 mV
>
>
> My kernel is the default in Debian testing, no mactel patches:
>
> thp@macbook:~$ uname -a
> Linux macbook 2.6.17-2-686 #1 SMP Wed Sep 13 16:34:10 UTC 2006 i686
> GNU/Linux
>
>
>
> thp
>


-- 
Miguel Sousa Filipe