Ticket #1712 (closed defect: fixed)

Opened 11 years ago

Last modified 10 years ago

Phone will not boot if battery is fully discharged, even if it is plugged in

Reported by: kenrestivo Owned by: openmoko-kernel
Priority: normal Milestone:
Component: kernel Version: GTA02v5
Severity: normal Keywords:
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:


The phone fails to boot-- or even to recharge-- when plugged in to the wall power supply, if the battery is fully discharged. It is unacceptable to have to remove the battery and place it into a separate phone from another manufacturer, or into a separate battery recharger (not supplied), in order to bring the phone back to an operational state.

The phone should have a power cube that delivers sufficient current to operate the phone even if the battery is fully discharged.

Likewise, the power connector to the phone should be capable of delivering that full load. If USB can't do that, then a separate power connector that is not limited by USB current limitations should be provided and it should mate with the power cube.

Change History

comment:1 Changed 11 years ago by zecke

  • Status changed from new to assigned
  • Owner changed from tick to openmoko-kernel
  • Component changed from Assassin to System Software

comment:2 Changed 10 years ago by andy

  • HasPatchForReview unset

This is a hardware issue, dependent on the hardware revision of GTA02 PCB. We can't fix this in the field and can only work around it in software, eg, turning the phone off when battery is low.

comment:3 follow-up: ↓ 4 Changed 10 years ago by mickey

FSO nowadays tries to handle this by

  • a) [if alive] doing a controlled shutdown when the battery is below 5% and we're not charging
  • b) [if suspended] relying on the BATLOW PMU wakeup event, finding out that why we woke up, then launching an emergency shutdown.

a) works fine and has been tested in the field. b) needs me having a battery dummy so I can hook my LAB PSU to the Neo testing this.

comment:4 in reply to: ↑ 3 Changed 10 years ago by perezdiez

Replying to mickey:
I tink that have just tested the b) case this morning:

I have had the freeruner unpluged and in suspend sice the Sunday 22 afternon. Yesteday morning 25 i check the batry gauge and was 18% and suspended the FR.
This morning at 08:30 CET booted when plugged.

comment:5 Changed 10 years ago by mickey

  • Status changed from assigned to closed
  • Resolution set to fixed

Excellent, thanks for confirming. I consider this being FIXED within the boundaries of our posibilities then.

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