The Cubox-i is a small square-size target based on IMX.6 and comes in various versions. The small size & strong package makes it ideal for demo, learning.

Mine is the i4Pro version which needs the imx6q-cubox-i-som-v15.dtb (or imx6q-cubox-i-emmc-som-v15.dtb ).

Those are actually compiled by the kernel but are not included in the final image.

Please just add these files in KERNEL_DEVICETREE of conf/machine/cubox-i.conf :
KERNEL_DEVICETREE = "imx6dl-cubox-i.dtb imx6q-cubox-i.dtb imx6dl-hummingboard.dtb imx6q-hummingboard.dtb imx6q-cubox-i-som-v15.dtb imx6q-cubox-i-emmc-som-v15.dtb"

My cubox-i i4Pro starts just fine after this little modification.

Thanks

FYI Solidrun ships a Cubox-M version with an IMX8M which could be a useful addition to the 3rdparty repo.