#12456 NORM 13.1.0: XO-4 C1 USB enumeration failure on resume

Zarro Boogs per Child bugtracker at laptop.org
Thu Jan 24 21:43:10 EST 2013

#12456: XO-4 C1 USB enumeration failure on resume
           Reporter:  greenfeld  |       Owner:  cjb                              
               Type:  defect     |      Status:  new                              
           Priority:  normal     |   Milestone:  13.1.0                           
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  diagnose   |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:             |  

Comment(by greenfeld):

 More notes from discussing this with Quozl on IRC while remotely analyzing
 the SKU 296 in this state:
  * This causes system suspending to fail because a task cannot be frozen.
  * Running "echo '6e:0 0' > /sys/kernel/debug/olpc-ec/generic" to power
 off the internal USB hub causes the error to stop appearing and allows the
 system to suspend
  * Running "echo '6e:0 1' > /sys/kernel/debug/olpc-ec/generic" after the
 above command turns the hub off powers on the hub and does not cause any
 new error messages to appear.

Ticket URL: <http://dev.laptop.org/ticket/12456#comment:6>
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