GSM Network Time
billk at iinet.net.au
Tue Jan 5 07:22:55 CET 2010
I am also on vodafone (Perth). I have not checked zoneinfo recently ,
but time is never sent. At one point Perth was in the eastern states
zone for vodafone which was ... odd. I get a lot of:
"2010.01.05 13:57:53.619 otimed INFO GSM: multiple
zones found" messages in the framework log, but not sure what they mean.
If your routing is ok, the FR will try and set its time via the european
server, which is pretty flaky - I use a local server and that works fine
over usb and wifi - set it in frameworkd.conf. The time must be within
some undefined (I cant find what it is) window before network time will
set it - if its too far out it will silently fail. GSM time will work
Make sure that your timezone and localtime files are ok (and not a
The phone rarely drifts away from time sync, but usually a large
discrepancy after a reboot/crash/remove battery.
On Tue, 2010-01-05 at 14:39 +1000, Denis Johnson wrote:
> Just as a data point, I have checked the default settings in shr-t but
> I know I have to use the date command in an ssh session to get date
> and time set correctly and also do a hardware sync. Strangely it seems
> to keep the time until I re-connect via usb and ssh in, from there the
> time goes out.
> I am also in Aus (Qld) on savytel (vodafone) network.
> Obviously I need to investigate further.
> cheers Denis
> On Tue, Jan 5, 2010 at 9:54 AM, W.Kenworthy <billk at iinet.net.au> wrote:
> > Not quite - it should be "if available" - network time is not part of
> > the base GSM standard but an extension which many (most?) networks done
> > use. The zone is part of the standard, but if your provider crosses
> > multi timezones as here in australia, you might not be able to properly
> > use it.
> > Beware using the default time server for network time - in europe it
> > might be ok, but it has jitter and offset here in australia at times -
> > set it to a local timeserver in /etc/frameworkd.conf.
> > Time keeping has improved a lot, but I still find I connect to a network
> > or use GPS once a day to make sure it stays on time.
> > BillK
> > On Mon, 2010-01-04 at 18:31 +0100, Marc Verwerft wrote:
> >> The section about Date/time settings in the SHR wiki from openmoko
> >> http://wiki.openmoko.org/wiki/SHR_User_Manual#Date_and_time says:
> >> "Date and time are automatically set from GPS or Network"
> >> Regards,
> >> Marc
> >> On Mon, Jan 4, 2010 at 6:25 PM, Esben Stien <b0ef at esben-stien.name> wrote:
> >> > Any way to extract the time from the GSM network and have the time set
> >> > based on this?.
> >> >
> >> > Any distro that does this or any tools available?.
> >> >
> >> > Many phones have this capability.
> >> >
> >> > It would also be nice to set the time based on GPS, when that is
> >> > available, but often when indoors, only GSM works.
> >> >
> >> > --
> >> > Esben Stien is b0ef at e s a
> >> > http://www. s t n m
> >> > irc://irc. b - i . e/%23contact
> >> > sip:b0ef@ e e
> >> > jid:b0ef@ n n
> >> >
> >> > _______________________________________________
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> >> > community at lists.openmoko.org
> >> > http://lists.openmoko.org/mailman/listinfo/community
> >> >
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