#9100 NORM 10.1.2: 2.6.27+ early boot crashes on XO1

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#9100: 2.6.27+ early boot crashes on XO1
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           Reporter:  dsd       |       Owner:  dsaxena                          
               Type:  defect    |      Status:  new                              
           Priority:  normal    |   Milestone:  10.1.2                           
          Component:  kernel    |     Version:  Development build as of this date
         Resolution:            |    Keywords:                                   
        Next_action:  diagnose  |    Verified:  0                                
Deployment_affected:            |   Blockedby:                                   
           Blocking:            |  
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Comment(by Quozl):

 We need an instrumented kernel with some way to get output from it, so we
 can find out where the kernel is failing to proceed.  Considering all
 output devices:

  * serial port ... is the most obvious way, but this would require
 hal.hurray or glowcohen to add a connector and level converter or swap the
 laptops for our analysis.

  * the speakers ... probably going to take too long to figure out, but a
 setup recipe for the sound device is in both the ALSA driver and
 OpenFirmware.

  * the LEDs ... from memory there's a GPIO to toggle ... and with a series
 of kernels over several days a kernel developer may find the point of
 failure.  An ugly prospect.

  * USB or wireless ... the software stack required is too large to
 consider.

  * SD ... my gut feel is that there's another stack too large.

  * the display ... the kernel frame buffer isn't available at this time,
 but is there a possibility of calling OFW from the kernel, to emit strings
 on the panel?

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Ticket URL: <http://dev.laptop.org/ticket/9100#comment:33>
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