[Gta04-owner] Phoenux drained and resuscitated

[Christoph Mair]

Am Samstag, 22. Oktober 2011, 11:16:48 schrieb Neil Jerram:
> On Sat, 22 Oct 2011 11:58:55 +0200, Dr. H. Nikolaus Schaller wrote:
> > Hi Neil,
> 
> Hi Nikolaus,
> 
> > Yes! Linux initializes the USB charger in one of the earlier steps
> > and then the system comes up.
> > 
> > As long as your PC supplies enough current (>500 mA) and you don't
> > switch on too many high
> > power consumers (WLAN, WWAN), there should be some remainder for
> > charging the battery.
> 
> Well so far I haven't touched WLAN or WWAN, so I presume they're still
> switched off.  And with the GTA02 it was always said that it could draw
> 500mA from a USB connection.
> 
> Presumably, then, with the wall charger - which supplies 1000mA - it
> will always be possible to recover from a drained battery?

If I understand the problem correctly the wall charger won't help you here, 
because it does not contain an USB host controller. The power management chip 
allows only 70mA to be drained from the USB connection until a valid endpoint 
(host) allows more (up to 500mA). I think the GTA04 does not recognise the 
wall charger as a "special device" which can supply more current.

Best regards,
  Christoph