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

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#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           
 Keywords:                       |           Next_action:  never set        
 Verified:  0                    |   Deployment_affected:                   
Blockedby:                       |              Blocking:                   
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 I'm having trouble using any of my two SD cards in an XO-1.5 (CL1B / D4).
 While the cards are detected fine and listing the root directory seems to
 work, trying to access a subdirectory or running the self-test yields one
 the following errors:

 {{{
 SDHCI: Error: ISR = 8000 ESR = 10 Data Timeout
 SDHCI: Error: ISR = 8002 ESR = 10 Data Timeout
 }}}

 Happens with OFW Q3A33 / EC 1.9.21 and OFW Q3A35 / EC 1.9.24.
 SD cards: Silicon Power SDHC Class 6 16GB, takeMS SDHC Class 6 4GB.

 The 16GB cards was used for running Debian on an XO-1, so it's known to
 work fine. The only issue on XO-1 was that it often required two boot
 attempts ("SD card failed to power up" or something like that).

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