#12478 NORM Not Tri: XO-4 false MPPT start with Darfon brick

Zarro Boogs per Child bugtracker at laptop.org
Thu Jan 17 15:04:03 EST 2013

#12478: XO-4 false MPPT start with Darfon brick
 Reporter:  greenfeld            |                 Owner:  rsmith       
     Type:  defect               |                Status:  new          
 Priority:  normal               |             Milestone:  Not Triaged  
Component:  embedded controller  |               Version:  not specified
 Keywords:                       |           Next_action:  diagnose     
 Verified:  0                    |   Deployment_affected:               
Blockedby:                       |              Blocking:               
 One of the Darfon bricks we have in Miami causes the EC to use MPPT
 charging when plugged into a XO-4 C1 while said XO is powered off.

 This reproduces with Q7B11 after upgrading to EC 3.0.9.

 This was verified over EC serial since the main CPU was not running at the

 No other green brick or white wall wart power supply tried to date has
 been found to do this in Miami even with the same XO-4.

 I need to hookup EC serial to another XO-4 and see if this can be
 reproduced with the same power supply but a different XO-4.

Ticket URL: <http://dev.laptop.org/ticket/12478>
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