Just updated the CuBox-I4-PRO to Kernel 3.15-rc7, from source available here:  https://github.com/jmontleon/fedora-20-cubox-i4pro/tree/3.15-rc7

# git clone -b 3.15-rc7 --single-branch https://github.com/jmontleon/fedora-20-cubox-i4pro

Compiled and installed OK..

Fedora release 20 (Heisenbug)
Kernel 3.15.0-rc7 on an armv7l (ttymxc0)
..........
# uname -a
Linux rgcubox 3.15.0-rc7 #1 SMP Sat May 31 04:42:51 BST 2014 armv7l armv7l armv7l GNU/Linux

Nice to see that work for ‘mainline’ support of this device is progressing in the main kernel.org tree, as well..

This is in contrast to the Odroid U3, which (for the U2/U3) seems to be stuck with a semi-propreitary ubuntu-centric version of (obsolete) kernel 3.8..

Robert Gadsdon.  May 31, 2014.