New ADSL connection on new PC necessary?

[jackson21]

Hi, all
Far two years I have collected several brands of Ubuntu and others on my Desktop PC.
Logging into Internet was always done automatically with "dhcp"with any new distro.
I have aFritzbox router 7140SL and it always comes up smoothly with the blinking leds
when I boot up any new Linux I installed. The leds settle and I can always connect into internet.

But !!!! Bought a new computer, ASROCK FM2A55, with GbLAN !! I plugged the network cable into the new PC
The router comes up with the leds ok exactly the same as with the former desktop PC
I installed the new Linux Mint 16. OK But it doesn't find my network
I installed the new UBUNTU 14.04 (Beta) , but it doesn't find my router either

"ifconfig" doesn't show my ethernet eth0 on the new PC.

My question , where to begin ???? with . Do I have to completely reinstall and set up my

router settings

Thank you for your patience

jackson

[steeldriver]

Probably the first step would be to identify the particular network hardware

sudo lshw -C network -sanitize

lspci -nnv | grep '\[02.0\]'

Then we can search for any known hardware / firmware / driver issues

[jackson21]

Thank you steel driver
Please be patient, because I have to change the computers

jackson

[jackson21]

To steeldriver,
the "sudo" suggestion provided PCI (sysfs)

The "lspci" suggestion provided no result
The fact is that on the new machine in "ifconfig" or "netstat" produces only the "lo" interface with 127.0.0.0 and nothing else.

Very strange, that the router is not recognized at all.


Thank you anyway steeldriver,

[pqwoerituytrueiwoq]

if you are only getting lo the system is not seeing the gigabit lan on the pc let alone the router on the other end
post the output of lspci -vv that will be a lot of text
make sure the gigabit lan is enabled in the bios (check motherboard manual)
is is possible the lan on the board is doa, but it is too early to know that for sure
the onboard lan on my system is not reliable and requires i cut power to the system to get it to work again

[jackson21]

Thank you all, solved, A new network card PCI Express Ethernet card. Plugging in the router and everything is ok.