Comment # 15 on bug 1205777 from Matthias Brugger

(In reply to Johannes Kastl from comment #9)
> What I fail to understand this far:
> 
> The board does not have a SPI flash (as far as I found out, so it needs to
> read the u-boot code from the sdcard (that for whatever reason is called
> mmc).
> 
> So the steps are:
> - board resets
> - board reads from sdcard from some offset
> - board boots into u-boot
> - u-boot fails to detect the sdcard OR
>   u-boot is able to start grub, but grub fails to find the root device
> ("error: ../../grub-core/commands/search.c:296:no such device:
> e590f1c9-3c90-4d9e-a0df-ff6e17559cf8.") OR
>   grub uses the wrong device ("failure reading sector 0x3786d40 from
> `hd1'.", which seems to have disappeared now that I removed the USB stick
> 
> If u-boot is booted, at least the board itself seems to find the sdcard. But
> u-boot does not? This would point to a bug in u-boot?
> 

Yes, Grub usese the EFI implementation of U-Boot to access the HW. And if
U-Boot access to the SD card is buggy, so will be the access from Grub.