We are trying to port Jelly Bean (android_jb4.2.2_1.1.0-ga_source) to our custom board based on imx6Q and facing the same issue as https://community.freescale.com/thread/310183
Below is our work procedure
Using NFS file system in SD card linux partition and uImage in windows partition, since we used this procedure successfully in Gingerbread and ICS.
Tried the same in SABRESD board as well with same result. Any help is very much appreciated.