bigbuba
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bigbuba got a reaction from Igor_K in eth0 stuck at half duplex Orange Pi Zero
NanoPi Neo have same problem with kernel 4.9+...4.10+. It's problem in sun8i-emac - driver. After ifconfig eth0 down && ifconfig eth0 up autonegatiation work fine. I think, that problem is garbage in PHY-state register after U-boot.
Problem can be resolved with adding:
pre-up /sbin/ifconfig eth0 down
pre-up /sbin/ifconfig eth0 up
pre-up /sbin/ifconfig eth0 down
in section eth0.