#10232 HIGH 10.1.2: WiFi dies on suspended XO-1, os300

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#10232: WiFi dies on suspended XO-1, os300
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           Reporter:  hal.murray    |       Owner:               
               Type:  defect        |      Status:  new          
           Priority:  high          |   Milestone:  10.1.2       
          Component:  not assigned  |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  never set     |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  
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Comment(by hal.murray):

 >> I've got the back of a system off.  Is there a handy place to get a
 >> scope/meter on the wakeup signal from the WiFi module to
 >> the EC?  Is that signal edge triggered or level sensitive?

 richard at laptop.org said:
 > Easiest place is on the WLAN module Pin 49.  Its connected to EC pin 36.
 >   Its an edge trigger signal and the WLAN should pulse it over and over
 if
 > it doesn't see communication from the host.

 Thanks.

 I soldered a handle on to pin 49.  I've got a scope on it.

 That line is normally high.  I see a 30 ms pulse going low when it is
 suspended and a packet arrives.

 I've seen a few cases of it not waking up when the left WiFi LED is on and
 the right one blinks.  When that happens, there is nothing on the scope.
 I just got good data from
 one of those events.

 The last response was at 13:18
 I woke it up at 13:46 by poking the touchpad.

 I've attached 2 files: dmesg output and /var/log/messages
 /sys/module/olpc/parameters/ecdebug was on

 It had been up for 15 hours, suspending about once per minute, so there is
 lots of junk in /var/log/messages.  (It was hung for several of those
 hours.)

 Looks like the dmesg buffer is so full of new stuff that the interesting
 old stuff is gone.
 Oh, well.  Next time...

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Ticket URL: <http://dev.laptop.org/ticket/10232#comment:18>
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