Re: Ethernet port not registering
My suggestion? Installing the -25 kernel? I thought alx was working; or was that the compiled version? Did the install go without error or warning? Any clues in dmesg?
dmesg | grep -i -e warn -e error
Do you think reinstalling from scratch would be worth a try?
Network Manager is not designed to manage two competing ethernet connections. I'd detach the ethernet from the Realtek, attach one to the Atheros and reboot.
"Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.