I started working on RIoTBoard recently for learning purpose. My develop environment is Ubuntu 18 and I'm trying to follow the steps mentioned in this link.
When I try to boot the board with SD card or uSD card, with correct boot config switch, it always boot in recovery mode. Meaning, when the board is powered up, no message seen in serial console. And the 'lsusb' command shows this entry "Freescale Semiconductor, Inc. i.MX6Q SystemOnChip in RecoveryMode". Boot from eMMC works fine, no issues. Does anyone has any clue what is happening on this board?