#12000 BLOC 12.1.0: SOC reading of zero caused failed XO-1.5 runin

[Zarro Boogs per Child]

#12000: SOC reading of zero caused failed XO-1.5 runin
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           Reporter:  greenfeld  |       Owner:                                   
               Type:  defect     |      Status:  new                              
           Priority:  blocker    |   Milestone:  12.1.0                           
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  diagnose   |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:             |  
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Comment(by dsd):

 While the workaround suggested is probably acceptable its also a little
 concerning that we don't really have a diagnosis here (right?).

 The root of the problem seems to be these lines which appear multiple
 times in kern.log:
 {{{
 <3>[ 2956.180024] olpc-ec:  timeout waiting for EC to read command!
 <3>[ 2956.320070] power_supply olpc-battery: driver failed to report
 `voltage_avg' property: 4294967291
 }}}

 (the property that fails to read varies each time, and the freqency of
 these errors is not overly high)

 They don't always cause runin failures - I guess it depends exactly which
 property read fails, and in which context.

 Do these lines appear in 11.3.1 runin logs running on the same XO with the
 same firmware?
 (if so, does downgrading the firmware to the 11.3.1 release version change
 anything?)

 I will attempt to run these tests this weekend.

-- 
Ticket URL: <http://dev.laptop.org/ticket/12000#comment:8>
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