Too Long; Didn't Read
If your WiFi is working properly but your wired ethernet connection isn't, here's a bunch of things you can do. Make sure that your ethernet is enabled and that it's working properly. If you've done everything above and nothing works, that means your computer is the problem. If it still doesn't work on Linux, then the problem lies in your hardware. Check out a related video below to see how to fix the problem below. If your router is faulty, it might be time for you to replace it.