#12763 NORM Future : XO-4 hang after a few minutes of idle using ad-hoc network in a specific environment

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#12763: XO-4 hang after a few minutes of idle using ad-hoc network in a specific
environment
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           Reporter:  Quozl   |       Owner:  Quozl                            
               Type:  defect  |      Status:  new                              
           Priority:  normal  |   Milestone:  Future Release                   
          Component:  kernel  |     Version:  Development build as of this date
         Resolution:          |    Keywords:                                   
        Next_action:  design  |    Verified:  0                                
Deployment_affected:  au      |   Blockedby:                                   
           Blocking:          |  
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Changes (by Quozl):

  * next_action:  diagnose => design


Comment:

 Further data:
  * the problem is not isolated to specific laptops,
  * the problem easily reproduces on between four and five laptops in a
 cohort of 22,
  * the last command response from the wireless firmware is for joining the
 ad-hoc network,
  * 10.23 milliseconds elapses,
  * a storm of 13 bogus receive event interrupts happens at 1.7ms
 intervals,
  * the CMD_MAC_MULTICAST_ADR command is uploaded, but not responded to,
  * a timeout is declared by the driver, but it does not reset the card.

 Analysis:
  * the wireless firmware has probably crashed 10.23 milliseconds after
 reporting successful join to the ad-hoc network.

 See [http://dev.laptop.org/~quozl/z/1WOMyI.txt driver debugging log with
 annotations].

-- 
Ticket URL: <http://dev.laptop.org/ticket/12763#comment:3>
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