Recently I bought a pile of brand new XPS 15s and a pile of U2422H and U2422HE monitors. Use case seems straight forward, one of each for everyone. Everything works great, the monitors look good, both have video, both appear in Device Manager just fine, laptops charge.

Except the Ethernet. I've tried everything. I found posts about disable EEE, Idle power down, etc. etc. I tried updating the monitor's firmware, tried updating the XPS drivers. Nothing works.

I have an older DA300 that I can plug into the same Ethernet cable and the same USB-C port and it all works perfect.

I'm going to lose my mind here. Do I just return all the U2422HEs and buy U2422Hs, and some docks?

It just sits here and does nothing. Sometimes it says "Identifying" and gets the DNS Server address, but it never connects and never gets an IP address.

 

Any help anyone can offer will make my day.