Booting Beagle Board Black fails.

[Ulrich Grey]

I have built an image for Beagle Bone Black with crochet from the alternate source tree
from Svatopluk Kraus and Michal Meloun. If I try to boot the board (I have pressed the
button etc.), I get this on the serial console:

Hit [Enter] to boot immediately, or any other key for command prompt.
Booting [/boot/kernel/kernel]...
Using DTB provided by U-Boot at address 0x80000100.
Kernel entry at 0x80200100...
Kernel args: (null)

There it hangs.
Can anyone give me advice?

Regards

Ulrich