#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                             
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Comment(by rsmith):

 Replying to [comment:14 dsaxena]:
 >
 > 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:

 something is funky with the above trace.  It shows zero time elapsing
 between the all 3 ec commands and the timeout which is highly unlikely.

 {{{

 > [ 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

 }}}

 Ditto here. Yet it claims to have received data.


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

 If we can reproduce this on a somewhat reliable basis then I need to dup
 it on a machine that has an EC serial port loaded so I can see what gong
 on in the EC.

 Also there an adjustable knob for the EC timeout you can try increasing
 that and see if the timeout goes away.

-- 
Ticket URL: <http://dev.laptop.org/ticket/7458#comment:15>
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