I have now seen exactly this problem twice. In each case, networking was working perfectly well before I did an upgrade from breezy using this process:
apt-get update apt-get dist-upgrade # reboot # edit sources.list to point to dapper apt-get update apt-get dist-upgrade # reboot The first time I saw this was on an AMD Athlon with IIRC an RTL NIC. I have just now upgraded a VMware virtual machine from breezy to dapper and the exact same thing occured. As the previous poster says, dmesg identifies the NIC and calls it eth0, yet when the box comes all the way up, there is no eth0, but instead an unconfigured eth1. I have no /var/log/dist-upgrade*.log files, I suppose because I did not use the upgrade tool. I seem to be at least the third person to report this, and I've seen it twice, so it is clearly not an isolated incident. -- after dist-upgrade from breezy to dapper, networking stops working https://launchpad.net/bugs/47407 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs