I noticed that the ubuntu Image(.img.gz) available for iMX6 sabre lite board. But I don't know whether it include zImage. I downloaded the mfgtools and checked the ucl2.xml, I found the u-boot , zImage, initramfs and rootfs can be flashed into the board. My question is that is it enough to flash ubuntu Image after flashing u-boot. Should I flash the zImage separately?
The ubuntu Image I mentioned above is Ubuntu Trusty for i.MX6/7 boards – March 2016 (kernel 3.14.52)