Harald Koenig wrote: > Hi, > > when my gta02v5 battery is completely empty I have two problems booting again > at all: > > 1) NAND u-boot does not work: > > after connecting AC charger I can start only NOR boot (aux button first), > but the NAND boot (no aux button, only pwr button for 10+ seconds just > does nothing, the aux button doesn't blink then either). > > removing power and battery for some 10 seconds doesn't help. > > just charging 10 minutes (using AC charger) before trying [nand] boot doesn't > help right now either. > > update (I write this email because right now I'm that "out of power mode > again":-( > > after 10+ minutes connection to AC charger (still powered off) I can't even > get into the NOR boot anymore. > I removed the battery and AC, reconnected both and NOR boot came up. > here I selected "power off" and tried to do a regular NAND boot (no aux) -- > doesn't react. > now NOR boot doesn't work either. > after some waiting (1 min?) NOR boot comes up again, now I selected "reboot" > (is this supposed to re-boot the nand uboot?). the screen got white for ~2 > seconds, > than black again and that's it:-( > > what's going wrong here ?? > > > 2) boot process crashes (switches off) with usb power from notebook > > if I connect the FR to my notebook (Lenovo T61p) for power and once I manage > to boot, > the boot just crashes after a while (1-2+ minutes), I only have a black > screen then > and all I can do to boot again (long pwr on). usually in this situation all > futher > tries to boot won't come up either. > > I'm not sure if these crashes might be triggered by the notebook having some > USB problems > ("device not accepting address ...") and thus disabling usb power for that > port > ("port 2 disabled by hub (EMI?), re-enabling...") or if that hub-disabling is > only > a result of the FR already being crashed or switched off during boot. > > > > solution in this case: I removed the empty battery, replaced it with the > battery > of my "real" (nokia) phone (nokia). then boot works, and while FR is running > and > connected to the notebook I swap batteries again and charge the empty FR > battery. > > I had this situation(2) at least 3-4 times before using various > uboot/kernel/distro versions, > I only started using the AC charger yesterday and realized, that it supplies > much higher current and charging goes much faster (almost a fator 3 in > charging rate!) > > > > > are these known problems ? > how can I get the FR up with empty batteries, how to charge an empty battery ? > > > thanks for any hint or comment, > > Harald http://wiki.openmoko.org/wiki/Freerunner_Hardware_Issues#PMU/Charger Issue
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