[Trac #596] inconsistent battery charge state indications

[Zarro Boogs per Child]

#596: inconsistent battery charge state indications
------------------------------------+---------------------------------------
 Reporter:  Quozl                   |        Owner:  ted.juan
     Type:  defect                  |       Status:  new     
 Priority:  blocker                 |    Milestone:  BTest-2 
Component:  hardware                |   Resolution:          
 Keywords:  ray.tseng at quantatw.com  |  
------------------------------------+---------------------------------------
Comment (by Quozl):

 Now two units are charging their battery despite it being marked as full.

 On restoration of battery and AC adaptor power over 40 minutes later, two
 units Quozl 3 and Quozl 2 went into charge mode (roughly 1.2 amp current
 shown on psu_0/current), and the other unit Quozl 1 did not.

 Logs were captured, using the following fragment:

 {{{
 date --rfc-3339=seconds
 cat /sys/devices/platform/olpc-
 battery.0/psu_0/{current,voltage,capacity_percentage,status}
 }}}

 Timestamps below meaningless, except relative to the file itself.

 quozl-3:
 {{{
 2006-12-20 01:45:40-05:00 1127 7518 100 present full
 2006-12-20 01:46:40-05:00 1207 7555 100 present full
 2006-12-20 01:47:40-05:00 1208 7574 100 present full
 2006-12-20 01:48:40-05:00 1208 7588 100 present full
 2006-12-20 01:49:40-05:00 1208 7598 100 present full
 2006-12-20 01:50:40-05:00 1208 7605 100 present full
 2006-12-20 01:51:40-05:00 1208 7608 100 present full
 }}}

 quozl-2:
 {{{
 2006-12-20 12:46:52-05:00 1126 7525 100 present full
 2006-12-20 12:47:52-05:00 1130 7556 100 present full
 2006-12-20 12:48:52-05:00 1132 7578 100 present full
 2006-12-20 12:49:52-05:00 1135 7594 100 present full
 2006-12-20 12:50:52-05:00 1135 7605 100 present full
 2006-12-20 12:51:52-05:00 1135 7611 100 present full
 }}}

 quozl-1:
 {{{
 2006-12-20 12:46:13-05:00 7 6912 100 present full
 2006-12-20 12:47:13-05:00 7 6912 100 present full
 2006-12-20 12:48:13-05:00 7 6911 100 present full
 2006-12-20 12:49:13-05:00 7 6911 100 present full
 2006-12-20 12:50:13-05:00 7 6910 100 present full
 2006-12-20 12:51:13-05:00 7 6910 100 present full
 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/596#comment:6>
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