On 6/20/2012 11:09 AM, Gregory P. Ennis wrote: > That's interesting. Here are the log entries for the previous card as > well as the eth4 that is currently installed. > > # PCI device 0x10ec:0x8168 (r8169) > SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:b3:10:f6:81", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3" > > # PCI device 0x10ec:0x8168 (r8169) > SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:e0:b3:10:fc:6e", ATTR{type}=="1", KERNEL=="eth*", NAME="eth4" have you deleted all the information from udev of the old card you pulled out. Could be an issue, not sure, if you are using the same slot ? Sometimes you get bad batches though and one failure can mean many more too. if both cards had the same issue, then I doubt udev or any of that is at fault. Having to unplug power to the machine is odd, but would support a bad card idea. Try instead of pulling plug, rebooting but unplugging network cable first, see if that has an effect. I would just return it and get a different type of card...or try an extra one you have lying around. All I know is with computers is come down to two things 1) its broke, return it 2) its something really silly, usually one misconfiguration or error, something simple but overlooked.