#10071 NORM Not Tri: external SD cards not working on XO-1.5

[Zarro Boogs per Child]

#10071: external SD cards not working on XO-1.5
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           Reporter:  sascha_silbe         |       Owner:  wmb at firmworks.com
               Type:  defect               |      Status:  new              
           Priority:  normal               |   Milestone:  Not Triaged      
          Component:  ofw - open firmware  |     Version:  1.5-C2           
         Resolution:                       |    Keywords:                   
        Next_action:  never set            |    Verified:  0                
Deployment_affected:                       |   Blockedby:                   
           Blocking:                       |  
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Comment(by sascha_silbe):

 Replying to [comment:3 pgf]:
 > the fact that one of the cards was also problematic on XO-1 is
 suspicious.
 I don't think it's related as the same error happened twice on XO-1.5 now,
 but on second attempt it worked as "well" as every other time (i.e. root
 dir works, but some other accesses time out).
 However using the 16GB card I now managed to trigger exactly the same
 error (i.e. {{{SDHCI: Error: ISR = 8000 ESR = 10 Data Timeout}}}) on XO-1
 using {{{dir sd:\security}}}. This command (with sd replaced by ext for
 XO-1.5) fails on both systems whereas {{{dir sd:\boot}}} fails only on
 XO-1.5. Even though the XO-1 cannot list {{{sd:\security}}} it recognizes
 the developer key in {{{sd:\security\develop.sig}}} quite fine.

 It appears the cards are quirky/unreliable on XO-1 as well and happened to
 work just well enough for me not to encounter the error during regular
 use. Talking about OFW only - the cards work fine on any system from
 within Linux. They are often quite slow (~300KB/s write speed) but I think
 that's more related to write amplification effect and the like, not a sign
 of the cards being problematic / quirky. No errors or warnings in the
 logs.

 > does the self-test work on these cards on XO-1?
 "test /pci/sd" doesn't produce any output for both of the cards.

 Is there a way to turn on some debug output that might shed more light on
 this issue?

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Ticket URL: <http://dev.laptop.org/ticket/10071#comment:4>
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