Fedora Arm Team:
I write to ask for your help with troubleshooting and solving a problem that seems to be unique to Fedora 26 on my pcduino3_nano device from Linksprite.
The device has an onboard NAND flash drive with an old custom version of ubuntu installed. I can use this system to verify that the networking works as expected when the ubuntu image is booted.
I have prepared both a Fedora 25 arm XFCE sd card and a Fedora 26 arm XFCE sd card.
Under the Ubuntu system dmesg says this about eth0:
[ 19.843724] eth0: PHY ID 001cc915 at 0 IRQ 0 (sunxi_gmac-0:00) active
[ 19.843737] eth0: PHY ID 001cc915 at 1 IRQ 0 (sunxi_gmac-0:01)
[ 30.344377] eth0: no IPv6 routers present
[ 34.676435] eth0: PHY ID 001cc915 at 0 IRQ 0 (sunxi_gmac-0:00) active
[ 34.676448] eth0: PHY ID 001cc915 at 1 IRQ 0 (sunxi_gmac-0:01)
[ 34.701645] ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 39.893312] eth0: PHY ID 001cc915 at 0 IRQ 0 (sunxi_gmac-0:00) active
[ 39.893327] eth0: PHY ID 001cc915 at 1 IRQ 0 (sunxi_gmac-0:01)
[ 39.910555] ADDRCONF(NETDEV_UP): eth0: link is not ready
When a cable is plugged into this interface networking works normally.