#11089 HIGH 1.75-fi: XO-1.75 B1 brick due to efface-md failure to flash-open (after RTC power fail or sufficient elapsed time) (was: XO-1.75 B1 brick after RTC power fail due to efface-md failure to flash-open)

[Zarro Boogs per Child]

#11089: XO-1.75 B1 brick due to efface-md failure to flash-open (after RTC power
fail or sufficient elapsed time)
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           Reporter:  Quozl                |       Owner:  wmb at firmworks.com
               Type:  defect               |      Status:  new              
           Priority:  high                 |   Milestone:  1.75-firmware    
          Component:  ofw - open firmware  |     Version:  1.75-B1          
         Resolution:                       |    Keywords:                   
        Next_action:  test in build        |    Verified:  0                
Deployment_affected:                       |   Blockedby:                   
           Blocking:                       |  
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Description changed by Quozl:

Old description:

> An XO-1.75 B1 with Q4B05 with an "md" tag will brick if the RTC loses
> power.
>
> Diagnosis: OpenFirmware serial port shows an ok prompt after an error
> ''Unsupported SPI FLASH ID''.  Using ''flash-open'' manually at this
> point shows no error.
>
> Workaround: flash Q4B02d, boot, then flash Q4B05.
>
> Prevention: manually change the "md" tag to an "MD" tag.

New description:

 An XO-1.75 B1 with Q4B05 with an "md" tag will brick if the RTC loses
 power, or if enough time has elapsed since the "md" tag was created in
 factory.

 Diagnosis: OpenFirmware serial port shows an ok prompt after an error
 ''Unsupported SPI FLASH ID''.  Using ''flash-open'' manually at this point
 shows no error.

 Workaround: flash q4b05jt (svn 2402) or later.

 Prevention: manually change the "md" tag to an "MD" tag, before the time
 has elapsed, or before the RTC loses power.

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Ticket URL: <http://dev.laptop.org/ticket/11089#comment:5>
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