#12779 NORM Future : XO-4 custom build hangs SD bus for mmc0 on resume

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#12779: XO-4 custom build hangs SD bus for mmc0 on resume
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           Reporter:  Quozl     |       Owner:  Quozl                            
               Type:  defect    |      Status:  assigned                         
           Priority:  normal    |   Milestone:  Future Release                   
          Component:  kernel    |     Version:  Development build as of this date
         Resolution:            |    Keywords:                                   
        Next_action:  diagnose  |    Verified:  0                                
Deployment_affected:  au        |   Blockedby:                                   
           Blocking:            |  
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Comment(by Quozl):

 Characterising the problem:

  * operating system build is Australia 33032xx4,
  * problem seen with access point Village Telco MP02, with firmware OLPC
 SECN Version 2.0 RC2d MP-02 r33887,
  * problem seen with access point Netgear D6300 with firmware
 V1.0.0.42_1.0.42,
  * problem not seen with access point Netgear WNDR3800,
  * in a group of 23 XO-4 the problem takes a little longer than an hour to
 occur on at least one XO-4,
  * kernel logs available from 17 instances,
  * a representative log is
 [http://dev.laptop.org/~quozl/12779-20140424-1-messages.log
 12779-20140424-1-messages.log],

 Details of tests:

  * Test 1: Start Time: 9:56AM,- End Time: 10:31 : 35 minutes, 1
 crashed(XO22), 22 not hung, 24april.zip -> XO22, This has different error
 log, look at the log.
  * Test 2: Continuation of the above test 1, where I am not rebooting all
 the XO, just rebooting the one which crashed and joining again the same AP
 and rest of 22 wake up from the sleep mode and joining the same().  Start
 Time: 10:31AM -  10:56AM : 25 minutes, 1 crashed(XO1), 22 not crashed,
 24april.zip -> XO1
  * Test 3: Continuation of above test 2, Start Time: 10:53AM - End Time:
 11:10AM : 17 minutes, 1 crashed (XO23), 22 not crashed, 24april.zip ->
 XO23
  * Test 4: Continuation of above test 3, Start Time: 11:10AM - End Time:
 11:12AM : 2 minutes, 1 crashed(XO18), 22 not crashed, 24april.zip -> XO18
  * Test 5: Continuation of above test 4, Start Time: 11:12AM - End Time:
 11:25AM : 13 minutes, 1 crashed (XO4), 22 not crashed, 24april.zip -> XO4
  * Test 6: Continuation of above test 5, Start Time: 11:35 - 12:00 : 25
 minutes, 1 crashed (XO6), 22 not crashed, 24april.zip -> XO6

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Ticket URL: <http://dev.laptop.org/ticket/12779#comment:8>
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