#7458 BLOC 8.2.0 (: Intermitent suspend/resume lockup

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#7458: Intermitent suspend/resume lockup
----------------------------+-----------------------------------------------
   Reporter:  dsaxena       |       Owner:  dsaxena                          
       Type:  defect        |      Status:  new                              
   Priority:  blocker       |   Milestone:  8.2.0 (was Update.2)             
  Component:  not assigned  |     Version:  Development build as of this date
 Resolution:                |    Keywords:  joyride-2131:-                   
Next_action:  diagnose      |    Verified:  0                                
  Blockedby:                |    Blocking:  7393                             
----------------------------+-----------------------------------------------
Changes (by dsaxena):

 * cc: rsmith (added)


Comment:

 Was able to capture another log and see something very similar, though not
 exactly the same has Javier.

 {{{
 [ 1341.014520] olpc_do_sleep!
 [ 1341.014520] olpc-ec:  running cmd 0x34
 [ 1341.014520] olpc-ec:  running cmd 0x24
 [ 1341.014520] olpc-ec:  running cmd 0x24
 [ 1341.014520] olpc-ec:  timeout waiting for EC to read command!
 }}}

 In this case we ran 0x24 but the second time it fails. The system comes
 out of suspend
 and then goes to sleep again, but we wake up immediately:


 {{{
 [ 1343.091325] olpc-ec:  running cmd 0x1c
 [ 1343.094392] olpc-ec:  received 0xff
 [ 1343.094392] olpc-ec:  running cmd 0x1b
 [ 1343.094392] olpc-ec:  sending cmd arg 0xbb
 [ 1343.094392] olpc-ec:  timeout waiting for EC to quiesce!
 [ 1343.094392] olpc-ec:  running cmd 0x84
 [ 1343.094392] olpc-ec:  received 0x20
 [ 1343.094467] olpc-pm:  SCI 0x20 received
 [ 1343.094484] olpc-ec:  running cmd 0x84
 [ 1343.104392] olpc-ec:  received 0x0
 [ 1343.104471] olpc-pm:  SCI 0x0 received
 ...
 [ 1344.271923] devpath 1 ep2out 3strikes
 [ 1344.271923] usb8xxx: URB in failure status: -71
 [ 1344.271923] devpath 1 ep3in 3strikes
 [ 1344.282012] PM: Finishing wakeup.
 [ 1344.285342] Restarting tasks ... done.
 # Go back to sleep
 [ 1344.344508] PM: Preparing system for mem sleep
 [ 1344.352450] Freezing user space processes ... (elapsed 0.00 seconds)
 done.
 [ 1344.361923] Freezing remaining freezable tasks ... (elapsed 0.00
 seconds) done.
 [ 1344.365272] PM: Entering mem sleep
 [ 1344.368684] Suspending console(s)
 }}}

 At this point the system just died. Chris, we still haven't reproduced the
 case you saw, correct?

 I'm adding Richard to this as it appears to be EC related.

-- 
Ticket URL: <http://dev.laptop.org/ticket/7458#comment:14>
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