[Trac #913] EC not going into low power mode.

[Zarro Boogs per Child]

#913: EC not going into low power mode.
----------------------+-----------------------------------------------------
 Reporter:  jg        |       Owner:  wad    
     Type:  defect    |      Status:  new    
 Priority:  high      |   Milestone:  BTest-2
Component:  hardware  |    Keywords:         
----------------------+-----------------------------------------------------
 In versions of EC code before QB61, the EC was left running, even if the
 processor was powered off.  This caused it to consume 27ma, which, if your
 machine was not powered from a transformer (or the battery removed), would
 drain the battery in a matter of days, unless the battery was removed from
 the unit.

 The battery could be drained so low that it would not charge at all, under
 some circumstances, as the voltage would get so low that the OLPC system
 would not even detect the battery was inserted and would not attempt to
 charge the battery.

 The BTest-2 systems have a "failsafe" trickle charger able to slowly
 resurrect such a battery even if drained entirely, so this situation
 should be recoverable on BTest-2 systems.

 As of QB61 (or later) the EC code should be putting the EC into a very low
 power mode, in which it will take weeks to drain an unused battery.  Even
 so, for long term storage, your best strategy is to fully charge the
 battery and remove it from the laptop.  This is true for just about all
 laptops out there.

-- 
Ticket URL: <http://dev.laptop.org/ticket/913>
One Laptop Per Child <http://laptop.org/>