Re: [Mactel-linux-users] power consumption?

[Sheer El-S. <sh...@gm...>]

Thomas, I'm not sure if you've seen this but Julien Blache has
discussed this on his blog:

http://blog.technologeek.org/

I think he says the lowest he gets is around 25 W which corresponds to
less than two hours of battery life.  I'm using OS X now so I can't
give you a reading but when I run Linux on my C2D MBP I usually get a
projected battery life of 1.5 hrs which matches what you're seeing.

As I understand it this is one of the main (if not the main) open
problem with Linux on these machines.  It seems that the MBP has some
hardware that controls the power profile of a lot of the rest of the
hardware .  This is called (I think) the system management controller
(SMC) and it is not, as yet, being taken full advantage of in Linux.
I hope some progress is made on this soon but so far I haven't seen
much change.

cheers,
Sheer

On 2/20/07, Michael Gangolf <mig...@gm...> wrote:
> Am Dienstag, 20. Februar 2007 22:06:52 schrieb Nicolas Bock:
> > Hi Thomas,
> >
> > I tried both of those and I still can't get below 22 W. Is that as low
> > as one can go?
> >
>
> Hi,
>
> # cat /proc/acpi/battery/BAT0/state
> present:                 yes
> capacity state:          ok
> charging state:          charged
> present rate:            0 mW
> remaining capacity:      44070 mWh
> present voltage:         12490 mV
>
> # cat /proc/acpi/battery/BAT0/info
> present:                 yes
> design capacity:         55000 mWh
> last full capacity:      44440 mWh
> battery technology:      rechargeable
> design voltage:          11100 mV
> design capacity warning: 250 mWh
> design capacity low:     100 mWh
> capacity granularity 1:  10 mWh
> capacity granularity 2:  10 mWh
> model number:            ASMB012
> serial number:
> battery type:            LION012
> OEM info:                Sony012
>
>
> Plugged in, light on the highest value, both cpu and full speed (governor:
> performance). CoreDuo MCB; kernel 2.6.20-mactel
>
> greetings,
> Michael
>
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