On Saturday, December 27, 2014 10:06:38 AM UTC-8, Charles Steinkuehler 
wrote:
>
> Also, if you've got a USB serial cable, you can pause the startup 
> sequence and poke around a bit with U-Boot to see what dtb file it's 
> trying to load. 
>
I attached a serial cable, but it doesn't say anything useful. I guess it's 
too much asking for uboot to log what it's doing...
...
SD/MMC found on device 1
reading uEnv.txt
678 bytes read in 5 ms (131.8 KiB/s)
Importing environment from mmc ...
gpio: pin 55 (gpio 55) value is 1
Checking if uenvcmd is set ...
gpio: pin 56 (gpio 56) value is 1
Running uenvcmd ...
mmc_send_cmd : timeout: No status update
Card did not respond to voltage select!
mmc0(part 0) is current device
Card did not respond to voltage select!
Card did not respond to voltage select!
** Bad device mmc 0 **
3574064 bytes read in 620 ms (5.5 MiB/s)
31547 bytes read in 74 ms (416 KiB/s)
Booting from mmc ...
Kernel image @ 0x80200000 [ 0x000000 - 0x368930 ]
## Flattened Device Tree blob at 80f80000
   Booting using the fdt blob at 0x80f80000
   Using Device Tree in place at 80f80000, end 80f8ab3a

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