#10144 LOW Not Tri: spurious red blink of battery LED, possible ESD event

[Zarro Boogs per Child]

#10144: spurious red blink of battery LED, possible ESD event
---------------------------------+------------------------------------------
 Reporter:  Quozl                |                 Owner:  rsmith                           
     Type:  defect               |                Status:  new                              
 Priority:  low                  |             Milestone:  Not Triaged                      
Component:  embedded controller  |               Version:  Development build as of this date
 Keywords:  q3a37                |           Next_action:  diagnose                         
 Verified:  0                    |   Deployment_affected:                                   
Blockedby:                       |              Blocking:                                   
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 Discard unreasonably battery voltage measurements.

 {{{
 <Quozl> smithbone: just back from a trip to town, XO-1.5 C1 that I
 carried is flashing red battery LED, attaching external DC makes no
 change, Sugar says Charged 69%, restarting to OFW and watch-battery
 says "69% 19.98V -0.00A 56C error"

 <smithbone> Quozl: when watch-battery exits it will tell you what
 the error is.

 <Quozl> LiFe Over Voltage

 ...

 <Quozl> Q3A37.

 <smithbone> 19.98V?

 <Quozl> Indeed.

 ...

 <smithbone> Quozl: I suspect you have found yet a different
 flavor of ESD corruption.

 <Quozl> History; unit fully charged, disconnected from DC, took it
 to town, used in town for half an hour, shut the lid, brought it
 back home.  Passed a strong television tower.  Yes, it's a high ESD
 potential day today.

 <smithbone> Quozl: I shall make the code discard voltage readings
 from the sensor that are way out like that.

 <Quozl> Okay, anything further you would like me to do on this
 unit before I use my initiative?

 <smithbone> Quozl: file a trac so I don't lose it?

 <Quozl> smithbone: ok.

 <smithbone> thans

 <Quozl> smithbone: new data; watch-battery shows -0.00A regardless
 of presence of external DC.

 <Quozl> smithbone: watch-battery correctly changes to "No battery"
 when the battery is removed.

 <smithbone> Quozl: When you get an error the battery system is
 disabled.

 <smithbone> Quozl: yep.  battery removal/ec reboot are your only
 options.

 <Quozl> smithbone: inserted an alternate battery, all indications
 good.  removed it and inserted the original battery, all
 indications back to normal, charging.  7.15V, 82%.
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/10144>
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