I've been having many problems trying to access mmc cards on the openbouffalo u-boot. I've finally found one I can reproduce consistently while testing madushan1000's usb/fastboot work.
I've done this 7 or 8 times in a row with the same results. I would expect to see data after flashing with madushan1000's image. And if I don't see it, I wouldn't expect my ubuntu machine to see things just fine after flashing.
- I make a SD card image as madushan suggest in his gist https://gist.github.com/madushan1000/830e6216db12d4ca3ded1208687f917d
truncate -s $((200*1024*1024)) disk.raw
$ mkfs.ext4 disk.raw
$ mkdir mnt