I just bought an ASUS P8H61-M LX motherboard. This motherboard comes with a Windows driver package to enable the onboard ethernet port. My troubles with this board are documented here and here. After installing Windows the LAN did not work either, but after installing the supplied driver disk in Windows the LAN was then enabled.
I have been googling for the Linux driver but cannot find it. I see that others have used this motherboard in Linux, so apparently it is possible. I wrote to ASUS but I do not expect a reply for 48-72 hours.
The driver can be found here as well as the answer as how to install it. The ASUS P8H61-M LX motherboard comes with the Realtek® 8111E , 1 x Gigabit LAN Controller(s) therefore the proper driver needs to be updated.
Your motherboard has a Realtek RTL8111E Gigabit Ethernet controller.
The driver built-into the Linux kernel should work, but if you wish to install the latest driver supplied by the manufacturer, you can get it here.
Open the downloaded file in Archive Manager, and extract it, e.g to the Downloads folder as shown below:
Open a terminal with
Ctrl-Alt-T
, and change to that directory, e.g.cd Downloads/r8168-8.031.00
Type
sudo ./autorun.sh
and that should take care of removing the old driver and installing the new one.The problem was the lack of drivers for this motherboard's NIC. I expand on the problem more here.