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.
ifconfig reports that the mac address of this interface is a2:40:c9:6a:6b:f6
Under Fedora 26 dmesg reports this about eth0:
[ 36.478651] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 36.655906] sun7i-dwmac 1c50000.ethernet eth0: RX IPC Checksum Offload disabled
[ 36.669475] sun7i-dwmac 1c50000.ethernet eth0: No MAC Management Counters available
[ 36.683220] sun7i-dwmac 1c50000.ethernet eth0: PTP not supported by HW
[ 36.744921] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Under Fedora 26 the mac address reported for the exact same hardware is: 02:4d:05:40:d1:11
I don't understand why two different os'es report 2 different mac addresses for the same physical nic. I know you can spoof nics, but I've not set this up so it shouldnt be happening.
Also under Fedora 26 the nic can obtain an ip address via dhcp, but I've yet to find a network task it can perform once configured. It can't ping, use the tcp stack browse the web, or any other task I tried.
It isn't fedora itself as I can insert a usb wifi dongle and networking fires up and works just fine, this tells me there is something specifically wrong with the kernel driver or some othe part of the system that is specific to the interface.
I'm willing to help troubleshoot and answer any questions, I just don't happen to know what would be useful/helpful at this point outside of what I've already provided.
Thanks for any help you can provide.
Rance
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