I just upgraded my cubox-i4pro to kernel linux-armv7 and linux-armv7-cubox version 5.8.8-1
Now I get the kernel message "fec 2188000.ethernet eth0: Unable to connect to phy" and I cannot raise the ethernet interface.
I can connect using a usb ethernet dongle, after which I find that nothing else is broken.
Is some firmware missing from from this kernel build, or maybe something missing in the device tree?