Sorry, that's Knoppix v5.1.1. I must have got the other version number from something else.

SLUG is not on a conventional ethernet cable because it's too far away to easily string a cable. It's connected through the home telephone wiring. That's what HomePNA does. So I can't put SLUG on the router without an ethernet-phoneline bridge. Netgear and Linsys used to make such bridges but they're not longer available. Is that what I need to use phoneline in Linux?

I can't completely swap the cards because the Realtek card is not a HomePNA card. The AMD card has connectors for phone and ethernet cable but the Realtek only has an ethernet cable connector.

I did unplug the phone cord and move the ethernet cable from the Realtek card to the AMD card. Knoppix was able to access the router and everything beyond it through the AMD card. So the PCnet32 driver supports the AMD card at least as an ethernet interface.

I tried dmesg | grep eth in both configurations. In both cases the Realtek was identified as eth0 and the AMD card as eth1.

With the ethernet cable on eth0 and the phone cord on eth1 (normal configuration for Windows) it says "eth1: link down" and later "ADDRCONF(NETDEV_UP): eth1: link is not ready" and then "eth1: link down" again (not recognizing the phoneline connection on eth1).

With the ethernet cable on eth1 and nothing on eth0 (configuration to test the AMD card) it says "eth0: link down" twice and "ADDRCONF(NETDEV_UP): eth0: link is not ready" (because nothing is plugged into eth0).

Apparently the AMD card is not recognized as being connected to anything if it's connected to the phone wire. Maybe the PCnet32 driver supports the ethernet function but not the phoneline function. And the Windows XP driver with ndiswrapper doesn't work at all; eth1 is not just down, but nonexistent - am I doing something wrong in the ndiswrapper configuration?

I've seen web pages that say there are no HomePNA Linux drivers available. I also saw one that tells how to compile a HPNA2 driver. If I remember correctly, what I have is a HomePNA 1.0 1Mb/s adapter.