I have the same problem (with "RTL8111/8168B PCI Express Gigabit Ethernet").
I don't know if this is important, but when I go to Network tools (or something like that, I'm Spanish and I use the Spanish version of Ubuntu) and hit "Configure" for any of the listed devices, I get a message like this "This device doesn't exists".
I have the same problem (with "RTL8111/8168B PCI Express Gigabit Ethernet").
I don't know if this is important, but when I go to Network tools (or something like that, I'm Spanish and I use the Spanish version of Ubuntu) and hit "Configure" for any of the listed devices, I get a message like this "This device doesn't exists".
Sorry for my bad English.
Jose