@Tony I can also confirm that the new firmware works for me. I can now use Auto-negotiation to get connected.

I live in an apartment building (in Sweden). All apartments have broadband from provider A3 (1000/1000 Mbit/s). All apartments have an RJ45 ethernet socket and that is what my router is connected to....

I have same router and same problems with WAN port. My Internet connection is 1000 Mbps. Router setting: Auto-negotiation: No connection 1000 Mbps: No connection 100 Mbps full duplex: Connection, but...