battery life problem

Robert Norton at
Wed Sep 24 20:50:34 CEST 2008

2008/9/24 Al Johnson <openmoko at>:
> On Wednesday 24 September 2008, Gothnet wrote:
>> Pietro &quot;m0nt0&quot; Montorfano wrote:
>> > Robert Norton ha scritto:
>> >> I observed the same problem with my newly arrived freerunner running
>> >> om2008.8 update. I fiddled with the wifi then did ifdown eth0 and
>> >> suspend. Bluetooth, wifi and GPS all set to off in settings. Less than
>> >> 24h later the neo would not turn on (thankfully there was enough
>> >> charge left to boot and start charging when I returned home).
>> >
>> > Yeah, anyone know anything to see which of the many things on the FR is
>> > draining my battery?
>> I'd like to add my voice to this lot, I've been getting in the order of
>> 8-12 hours of battery life with minimal conversation or testing and
>> everything switched to off. I even looked to see if there was a higher
>> capacity battery available (there isn't).
>> It seems to be a little better with up to date Om2008.08, but not a hell of
>> a lot.
>> Any tips on diagnostics to run?
> My money's on the GSM module. I switched the GSM off because there was no SIM
> in, suspended the phone on a Friday afternoon and powered it up on Monday to
> find ~70% battery remaining. With GSM enabled and SIM inserted battery life
> is variable; sometimes it'll make it through the night with a fair bit of
> charge left, and other times it's dead by morning. I know that I sometimes
> get persistent, frequent GSM reregistration, and from the interference it
> generates on the PC speakers I know this is probably drawing a fair bit of
> current. The reregistration is a persistent, intermittent (for me) and as yet
> unexplained problem:
That's interesting! I didn't have a SIM card inserted so perhaps that
is part of it. Perhaps the GSM module is upping the power in order to
try and register but never succeeds because obviously it can't without
a SIM (just hand waving here, I know nothing about how this all

How did you turn off the GSM module?



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