that's sad 🥲 So, the possible solution is that i could find lenovo y480 ethernet drivers suitable for linux. The strange thing is ,my y480 installed linux when i bought it from dealer🙃 Anyway, thanks for the help👍.
My hardware is an old laptop -- lenovo ideapad Y480n (produced in 2012)
Wired network drive: atheros ethernet controller
Wi-fi hardware: intel 2200 BGN
The version of UNRAID is 6.11.1
When i plug Ethernet cable in the RJ45, unraid GUI still says no network
How to solve this problem, I can't even get a trial license...