My Gta02s wont charge
joerg at openmoko.org
Sun Jun 22 19:51:52 CEST 2008
A sure fix should be: insert "good" battery, attach wall-charger, boot all the
way to system, replace "good" by drained battery *without* switching off or
Am So 22. Juni 2008 schrieb steve:
> Haha the vulcan mind meld. I will try it
> -----Original Message-----
> From: Sean McNeil [mailto:sean at mcneil.com]
> Sent: Friday, June 20, 2008 11:17 AM
> To: steve
> Cc: 'Werner Almesberger'; openmoko-kernel at lists.openmoko.org
> Subject: Re: My Gta02s wont charge
> Yes, I can run off usb without the a battery. But if I have a drained
> battery, I cannot. Seems like charging pulls too much power so I cannot
> run.What I had to do at one time was pull battery and charger out. Hold down
> the aux key. Put battery in. Put usb in. hold down the power key.
> release aux key. wait for menu. When I did this the battery starts to
> steve wrote:
> > Na, mine wont run off USB power. I'll double check on a 2nd computer.
> > My unit is pre production, but I know guys have done battery drain
> > tests With no problems. So, scratches head....
> > I tried with the battery in, battery out. Sean, can you run yours
> > while plugged into usb with the battery removed?
> > You have a phone from the same batch I have.
> > -----Original Message-----
> > From: Werner Almesberger [mailto:werner at openmoko.org]
> > Sent: Wednesday, June 18, 2008 6:24 PM
> > To: Sean McNeil
> > Cc: steve; openmoko-kernel at lists.openmoko.org
> > Subject: Re: My Gta02s wont charge
> > Sean McNeil wrote:
> >> You do not need a battery to run the phone. It will run off USB power.
> > Some do, some don't. E.g., I never got any GTA02 (out of 1-2 samples)
> > to run from USB power for more than a few seconds.
> > Regarding charging, the big issue seems to be that we turn off the
> > charger if we don't have USB power. The PMU remembers that setting
> > while it has any power at all. Thus, if the battery is empty and the
> > charger happens to be turned off, USB power is simply ignored.
> > So far the theory. I've tried to actually confirm that behaviour (so
> > that I could observe an improvement after changing the logic), but
> > only got more or less random results, with the system occasionally not
> > charging when it should, and (quite often) happily powering up when I
> > didn't expect it to :-(
> > So there seems to be more going on than meets the eye.
> > - Werner
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