Solving LAN wired connection of Lenovo G580 on Ubuntu Linux

Step-by-step:

1. Download the alx driver from the following link: compat-wireless-2012-05-10-p.tar.bz2 
2. Extract the driver file with the command,

   tar -xvf compat-wireless-2012-07-03-p.tar.bz2

3. Change directory to extracted folder

   cd compat-wireless-2012-05-10-p

4. Run the following command,

   scripts/driver-select alx 

5. Run command

   sudo make 

6. Run command

   sudo make install 

7. Make the driver work, it's done!

   modeprobe alx 

It may works not only on Ubuntu OS, but also on other Linux distribution including Ubuntu derivative (Linux Mint, Blankon) and RPM-based OS. Just change the command in appropriate way.

 

Refference:
http://www.zyxware.com/articles/2680/solved-wired-connection-eth0-not-detected-in-ubuntu-12-04