This is a builtin device to motherboard, Intel server S875WP1-e
I tried different cables, and moved switch next to PC. I also tried Ubuntu.
The cables do work at gigabit speeds.
So does anyone know why?
It is enabled in the bios. And latest bios p18 is installed.
I tried installing the intel win32 drivers for ethernet, and it errors saying there are no intel adaptors are present, yet they are. This board has 2 builtin Intel ethernet controllers..