Booting XO-1 with SD card occasionally hangs on I/O timeouts

[Hal Murray]

Is this an interesting problem?  If so, what should I do to get more info?

It only happens occasionally, say 1 out of 100 times.

It recovers if I unplug the SD card.   The card is a Kingston, 8 GB.

/var/log/messages has lots of things like this:

May  8 09:32:09 xo-0d-57-33 kernel: [ 6209.920040] mmc0: Timeout waiting for 
hardware
 interrupt.
May  8 09:32:09 xo-0d-57-33 kernel: [ 6209.959277] mmcblk0: error -110 
transferring d
ata, sector 5, nr 3, cmd response 0x900, card status 0x0
May  8 09:32:09 xo-0d-57-33 kernel: [ 6210.036110] end_request: I/O error, 
dev mmcblk
0, sector 5

May  8 09:32:09 xo-0d-57-33 kernel: [ 6220.080041] mmc0: Timeout waiting for 
hardware
 interrupt.
May  8 09:32:09 xo-0d-57-33 kernel: [ 6220.119241] mmcblk0: error -110 
transferring d
ata, sector 6, nr 2, cmd response 0x900, card status 0x0
May  8 09:32:09 xo-0d-57-33 kernel: [ 6220.195925] end_request: I/O error, 
dev mmcblk
0, sector 6

May  8 09:32:09 xo-0d-57-33 kernel: [ 6230.240040] mmc0: Timeout waiting for 
hardware
 interrupt.
May  8 09:32:09 xo-0d-57-33 kernel: [ 6230.279282] mmcblk0: error -110 
transferring d
ata, sector 7, nr 1, cmd response 0x900, card status 0x0
May  8 09:32:09 xo-0d-57-33 kernel: [ 6230.355971] end_request: I/O error, 
dev mmcblk
0, sector 7


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