#9865 BLOC 1.5-sof: Laptop hangs on resume

[Zarro Boogs per Child]

#9865: Laptop hangs on resume
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           Reporter:  wad       |       Owner:  dsaxena                       
               Type:  defect    |      Status:  new                           
           Priority:  blocker   |   Milestone:  1.5-software-later            
          Component:  kernel    |     Version:  1.5-B2                        
         Resolution:            |    Keywords:  blocker? XO-1.5 suspend resume
        Next_action:  diagnose  |    Verified:  0                             
Deployment_affected:            |   Blockedby:                                
           Blocking:            |  
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Comment(by pgf):

 playing with wad's machine ("C1 prebuild #2"), with wireless card removed,
 i'm seeing, no correlation with rtcwake timer enabled or not.

 my testing has been with automatic power management enabled.  i'm seeing a
 correlation with how long the laptop has been asleep.  if keyboard
 activity happens within about 2 minutes of last activity, then the laptop
 wakes just fine.  if keyboard activity happens after 3 or 4 minutes of
 last activity, then it's unlikely it will wake up.  (i did see it wake
 once after 4.5 minutes, but usually it won't after 3.)

 "echo 9 > /proc/sys/kernel/prink" prevents the lockup, reliably.

 symptom of lockup is "+r" and nothing more on serial.

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Ticket URL: <http://dev.laptop.org/ticket/9865#comment:47>
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