After quite a lot of messing about, I got Fedora 22 running on the ARM64 DragonBoard 410c:

Fedora release 22 (Twenty Two)
Kernel 4.0.0-linaro-lt-qcom on an aarch64 (ttyMSM0)
............
$ uname -a
Linux rg410c rg410c.almaden 4.0.0-linaro-lt-qcom #1 SMP PREEMPT Fri Jun 5 15:17:06 UTC 2015 aarch64 aarch64 aarch64 GNU/Linux

Still running the ‘stock’ Linaro/Qualcom version of Kernel 4.0.0+, but I am carrying out more tests with compiling my own..

As the device relies on the Android-centric fastboot rather than U-Boot, I have a suspicion that the kernel will need to be entirely monolithic, but I need to do some more work on this..   I did get the device booted with Kernel 4.1-rc8 compiled from Linaro source, but some of the functionality was missing..

Fortunately, support for an AX88179 ethernet/usb adapter was included in the kernel, and so I was able to set up a LAN connection easily..

More details to follow…

Robert Gadsdon.   June 30, 2015.