Just updated the CuBox to kernel 3.17-rc1, but still used the previous ‘combined zImage plus DTB’ method, which works OK..

Kernel source here:  # git clone -b 3.17-rc1 –single-branch https://github.com/jmontleon/fedora-20-cubox-i4pro

Fedora release 20 (Heisenbug)
Kernel 3.17.0-rc1 on an armv7l (ttymxc0)
................
# uname -a
Linux rgcubox 3.17.0-rc1 #1 SMP PREEMPT Tue Aug 19 13:48:28 EDT 2014 armv7l armv7l armv7l GNU/Linux

Compile workflow is:

make oldconfig 
or
make xconfig

make -j5 zImage

make dtbs

cp System.map /boot

cat arch/arm/boot/zImage arch/arm/boot/dts/imx6q-cubox-i.dtb > zImage_dtb

mkimage -A arm -O linux -T kernel -a 0x10008000 -e 0x10008000 -n cubox_linux -C none -d zImage_dtb /boot/uImage317rc1

make -j5 modules

make modules_install

cd /boot

rm -f uEnv.txt

Edit uEnv.txt.317rc1 to reference bootfile=/uImage317rc1, and softlink to uEnv.txt (in /boot)...

uEnv.txt.317rc1:
bootfile=/uImage317rc1
mmcargs=setenv bootargs root=/dev/mmcblk0p3 rootfstype=ext4 rootwait console=ttymxc0,115200n8 console=tty1 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32

Robert Gadsdon..  August 21, 2014.