If you would put on your SD card the multi boot image, you could boot jumpdrive but also a Mobian system. And could eventually check what's wrong on your emmc installation. I myself always have the multi boot image inserted since one can choose to boot from the emmc also. I love it!
I saw also quite a bunch of people having a corrupted f2fs filesystem. That also could be checked with booting from the SD card.
I saw also quite a bunch of people having a corrupted f2fs filesystem. That also could be checked with booting from the SD card.