Realtek RTL8101/2/6E PCI EXPRESS FAST/GIGABIT Ethernet Controller Laptop is Hp-r014-tx
If you mean that your network card isn't detected, try installing the Realtek driver from their website ("LINUX driver"). If needed, there are install directions at Ask Ubuntu.
You're correct I too use these drivers and on one of my HDD's it was out of date seeing it's my backup. On it I had an issue where I refused to detect, the other my main HDD all went smooth, I copied the drivers over from the 2nd HDD and it started working just fine.
