I followed the instructions in the link suggested by McPeter. They were clear, simple and they worked! The disadvantage is that you have to repeat the process after any kernel upgrades.
For those not confident in their French: http://translate.google.com/translate?u=http%3A%2F%2Fblinckers.dnsalias.net%2Fpublic%2Fastuces %2Freseau-ethernet-realtek-rtl8111-8168.html&hl=en&ie=UTF8&sl=es&tl=en -- r8169 driver does not work with Realtek RTL8111C gigabit ethernet chip in Ubuntu 8.04 beta https://bugs.launchpad.net/bugs/212497 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs