[maemo-users] N900 battery duration

From: Kai Thomsen thomsenk at t-online.de
Date: Fri Oct 16 23:19:49 EEST 2009
When I think back to the N900 hardware lighting talk and the warning
about not fixing the CPU's clock to one of the high frequencies, I guess
that connecting the N900 to a charger should not change the power
settings of the system, i.e. not like with a laptop CPU that's behaving
differently when running on batteries. But that's just a guess, someone
with more knowledge of the ARM Cortex 8 architecture or even better the
N900's architecture (Nokian's, where are you?) should have the right
answer to that.

Am Freitag, den 16.10.2009, 21:59 +0200 schrieb Andrea Grandi:
> Hi
> p.s: my N900 was connected to charger during this test... do I have to
> disconnect it before doing the test?
> 2009/10/16 Andrea Grandi <a.grandi at gmail.com>:
> > Hi,
> >
> > 2009/10/16 Kai Thomsen <thomsenk at t-online.de>:
> >> Hmm, Skype and apps like that might suck quite a bit of battery,
> >> depending on how chatty they might become in their idle states. Knowing
> >> a bit about Skype from monitoring a large company network, especially
> >> when it does not get a connection or an unreliable connection it tries
> >> to connect to the next Supernode very often, at least once a minute.
> >> Wireshark might help you to find out how "chatty" your N900 is...
> >> If I have some time over the weekend, I could run some tests with
> >> Wireshark and Skype/Foreca/Facebook and whatever else is usually running
> >> on my N900 to see how often these apps actually send traffic in their
> >> idle states.
> >
> > it would be great!
> >
> > Anyway, here is the result of powertop execution on my N900:
> > http://pastebin.ca/1624111
> >
> > I hope it can help you to understand what's happening :)
> >
> > --
> > Andrea Grandi
> > email: a.grandi [AT] gmail [DOT] com
> > website: http://www.andreagrandi.it
> > PGP Key: http://www.andreagrandi.it/pgp_key.asc
> >

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