Often it just doesn't start properly. Power cycling doesn't fix it. When I boot 4.4 image, then 4.9, then it seems fine. 4.4 always boots EDIT: Keep getting this. Inserting 4.4 fixes the boot process. I'm erasing the eMMC, see if that does anything. root@bone1-49:~# dd if=/dev/zero of=/dev/mmcblk1 Nope. Same behavior.