My Gta02s wont charge

steve steve at
Wed Jun 25 19:16:33 CEST 2008

  werner wants us to do some tests. I have to reschedule to come to your
house on Friday.

  We will figure it out there.

-----Original Message-----
From: Michael Shiloh [mailto:michael at] 
Sent: Tuesday, June 24, 2008 9:32 PM
To: steve
Cc: 'Joerg Reisenweber'; openmoko-kernel at
Subject: Re: My Gta02s wont charge

I'm back now, and I have a couple. Should I mail you one?


steve wrote:
> Ah,
>  problem is getting a good battery. Local stores don't carry battery 
> chargers.
> -----Original Message-----
> From: Joerg Reisenweber [mailto:joerg at]
> Sent: Sunday, June 22, 2008 10:52 AM
> To: openmoko-kernel at
> Cc: steve; 'Sean McNeil'
> Subject: Re: My Gta02s wont charge
> 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 suspending system.
> /j
> Am So  22. Juni 2008 schrieb steve:
>> Haha the vulcan mind meld. I will try it
>> -----Original Message-----
>> From: Sean McNeil [mailto:sean at]
>> Sent: Friday, June 20, 2008 11:17 AM
>> To: steve
>> Cc: 'Werner Almesberger'; openmoko-kernel at
>> 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 
>> charge.
>> 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]
>>> Sent: Wednesday, June 18, 2008 6:24 PM
>>> To: Sean McNeil
>>> Cc: steve; openmoko-kernel at
>>> 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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