I've had some issues with installing Lazarus in 10.04. After I finally installed it with aptitude, while running it prompted whole bunch of errors. Finally my PC was suspended and I had to reset it. After that my ethernet doesn't work. In my file

/etc/network/interfaces

there is only

auto lo

iface lo inet loopback

no sign of eth0.
Many of possible solutions don't work. Unfortunately I cannot give the full output of

sudo ifconfig -v -a

or

sudo lshw -C network

because I am writing this post using my spartphone. The fact is that the first shows my eth0, and the latter gives:

*- network DISABLED

description: Ethernet interface

product: RTL8111/8168B PCI Express  Gigabit Ethernet controller.

Reinstalling drivers didn't change a thing.
How can I run the same procedure that detects connection during Ubuntu installation process? I suspect that it could solve the problem.

Thanks