I tried to install Ubuntu 18.04.2 server but could not because the onboard NIC on my S2600STB was not detected. I then booted from a live USB to investigate. The Network Manager list four possible wired connections (2 onboard plus the two unused SFP+) but they are grayed out. Also, the LAN LED is not lit. The onboard NIC is enabled in the BIOS.
One other strange detail. The Ubuntu Network Manager lists the wired connections as X722. Is this normal? I do not have the X722 card.
Edit: Forgot to mention that BIOS is up to date.
Edit2: Should I have posted this in the Ethernet thread?
I am glad to hear that you were able to resolve your problem.
Please let me know if you need further assistance or if we can close this thread.
Intel Customer Support Technician
Under Contract to Intel Corporation
For firmware updates and troubleshooting tips, visit :https://intel.com/support/serverbios