#11207 NORM 1.75-fi: 1.75 B1 EC/OFW communications failure

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#11207: 1.75 B1 EC/OFW communications failure
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           Reporter:  greenfeld            |       Owner:  wmb at firmworks.com                
               Type:  defect               |      Status:  new                              
           Priority:  normal               |   Milestone:  1.75-firmware                    
          Component:  ofw - open firmware  |     Version:  Development build as of this date
         Resolution:                       |    Keywords:                                   
        Next_action:  diagnose             |    Verified:  0                                
Deployment_affected:                       |   Blockedby:                                   
           Blocking:                       |  
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Description changed by greenfeld:

Old description:

> SHC12900064 booted but stopped with only the XO character showing (no
> progress dots or text).  The keyboard and battery charging are
> functional.  Unfreezing the DCON and working over IRC Quozl and I seem to
> have diagnosed an EC/HOST communications failure which needs further
> diagnostics.
>
> The laptop has Q4B08 installed, and is being kept alive on AC power until
> we come up with something else we think is worth looking at.
>
> I believe Martin has also occasionally seen an XO fail to boot while
> stuck on an XO, so this could potentially be more than a one-off.

New description:

 SHC12900064 booted but stopped with only the XO character showing (no
 progress dots or text).  The keyboard and battery charging are functional.
 Unfreezing the DCON via the "visible" command and working over IRC Quozl
 and I seem to have diagnosed an EC/HOST communications failure which needs
 further diagnostics.

 The laptop has Q4B08 installed, and is being kept alive on AC power until
 we come up with something else worth looking at.

 We tried using the "sound" command to verify they keyboard worked, and now
 it is stuck in an infinite 250ms loop playing the start of the startup
 sound.

 I believe Martin has also occasionally seen an XO fail to boot while stuck
 on an XO, so this could potentially be more than a one-off.

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Ticket URL: <http://dev.laptop.org/ticket/11207#comment:1>
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