#10053 NORM Not Tri: Flaky audio selftest

[Zarro Boogs per Child]

#10053: Flaky audio selftest
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 Reporter:  wmb at firmworks.com    |                 Owner:  wmb at firmworks.com
     Type:  defect               |                Status:  new              
 Priority:  normal               |             Milestone:  Not Triaged      
Component:  ofw - open firmware  |               Version:  not specified    
 Keywords:                       |           Next_action:  diagnose         
 Verified:  0                    |   Deployment_affected:                   
Blockedby:                       |              Blocking:                   
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 Chia-Hsiu reports:
 {{{
 When we are trying to make sure that everything is ok before MP , we find
 a weird thing.
 The audio loopback test fail whether in SMT test or in FINAL test.
 We have verified loopback cable, and it’s ok.
 Use another more high quality (low Ω)loopback cable is the same.
 But the strange thing is we didn’t find this situation in factory during
 RAMP.
 So we reflash BIOS from q3a33 to q3a29 ,q3a29 was the one used in RAMP
 SMT, but still fail.
 At this moment, Wei-Heng remember you told to him that chip too hot may
 cause fail.
 So add a fan face to chip, the pass rate is better than before.
 And we also found if we delay some time when machine tell us to connect
 loopback cable, the pass rate is better.

 Only test /audio is pass all the time, want to duplicate this need whole
 SMT/FINAL test procedure.
 If type ‘ true to (diagnostic-mode?) and do autorun-mfg-tests , the
 loopback test pass all the time.

 Finally, Wei-Heng move memory selftest order to the last and loopback test
 pass all the time.
 But we didn’t find this situation in factory, it’s really weird.
 And internal audio test never fail , only external audio.
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/10053>
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