Good information. Thank you.
05:00.0 Ethernet controller: Intel Corporation Enterprise Southbridge DPT LAN Co pper (rev 01)
So your hardware is present, and detected. But why the space in "Co pper". Maybe a typo?
[root@xxxx ~]# lsmod | grep e1000
e1000 178816 0
And the appropriate module is loaded.
But it is not seen
This is what I get when I try to configure an ethernet interface:
This won't work until your interface shows up in ifconfig,
which it currently does not.
I googled 05:00.0 Ethernet controller: Intel Corporation Enterprise Southbridge DPT LAN Copper
There were 3 results. None helpful.
Please check that this device is enabled in your BIOS.
If so, I am fresh out of ideas and I suggest you disable the on-board interface with your BIOS, and buy another card (they are cheap now, and 3Com-anything seems to work with linux in my experience)
Sorry I cannot be more helpful.