#1752 BLOC Trial-2: USB wireless suspend/resume failure at setup phase

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#1752: USB wireless suspend/resume failure at setup phase
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  Reporter:  marcelo   |       Owner:  richard
      Type:  defect    |      Status:  new    
  Priority:  blocker   |   Milestone:  Trial-2
 Component:  wireless  |     Version:         
Resolution:            |    Keywords:         
  Verified:  0         |  
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Comment (by cjb):

 Replying to [comment:13 rsmith]:
 > I will create some firmware that does this but I see this as a band aid
 fix.  There is still a problem here and if we don't understand it then its
 sure to return and bite us again later.

 Richard's new EC gets us to the stability of the no-detach firmware
 without using a modified wireless firmware, which is a big step forward.
 I'm seeing a bug, which doesn't look like a wireless bug, where the laptop
 just outright refuses to wake up after some number of suspend/resumes.
 Pressing the power/game buttons doesn't get me a "+r", and
 "olpc_do_sleep!" is the last thing seen from the kernel, which suggests
 (as do the LEDs having gone off) that we powered down normally.

 dmesg attached; there are 67 successful resumes, and then the failure.

 Note that we occasionally see things like:

 {{{
 [  194.141477] olpc_do_sleep!
 +r[    0.396028] Timeout waiting for EC to read command!
 [    0.545181] Timeout waiting for EC to read command!
 }}}

 in the log, so it sounds like the EC interaction is not yet robust.

 > What this suggests to me is that the resume path has some timing issues.
 Lets think about how to narrow this down further.

 (Agreed.)

-- 
Ticket URL: <http://dev.laptop.org/ticket/1752#comment:14>
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