Can't access Internet via Ethernet on Haswell Desktop

[Stephen Vincent]

(Sorry I've tried suggestions made in related threads but no joy)

I have a new desktop (Haswell i5-4430 with Asrock Z87 Pro3 motherboard) on which I've installed Ubuntu 12.04.02. However the Ethernet connection doesn't seem to be recognized: attempts to enable networking result in the error message "Network disconnected - you are now offline". The hardware was tested on a Windows system before I got it and Ethernet was working.

Any help would be much appreciated.

Some diagnostics:

cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface eth0 inet dynamic


ifconfig -a
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

pan0 Link encap:Ethernet HWaddr ee:0a:87:0b:aa:60
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)


lshw -class network
WARNING: you should run this program as super-user.
*-network UNCLAIMED
description: Ethernet controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 19
bus info: pci@0000:00:19.0
version: 04
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=0
*-network DISABLED
description: Ethernet interface
physical id: 2
logical name: pan0
serial: ee:0a:87:0b:aa:60
capabilities: ethernet physical
configuration: broadcast=yes driver=bridge driverversion=2.3 firmware=N/A
multicast=yes

[chili555]

cat /etc/network/interfaces
auto lo
iface lo inet loopback
iface eth0 inet dynamic

Please open a terminal and do:

gksudo gedit /etc/network/interfaces

Comment out the incorrect line:

auto lo
iface lo inet loopback
#iface eth0 inet dynamic

Proofread, save and close gedit. Reboot. Now, again in a terminal, let's gather some information:

lspci -nn | grep 0200
dmesg | grep e100

Please post the result.

[Stephen Vincent]

Tx, chili555.

After commenting out the suggested line in /etc/network/interfaces. the output of those commands is:

$ lspci -nn | grep 0200
00:19.0 Ethernet controller [0200]: Intel Corporation Device [8086:153b] (rev 04)
$ dmesg | grep e100
$

[chili555]

Ethernet controller [0200]: Intel Corporation Device [8086:153b] (rev 04)

Your device is claimed by the driver e1000e, let's do some checking:

modinfo e1000e | grep 153B
sudo modprobe e1000e
dmesg | grep e100

[Stephen Vincent]

$ modinfo e1000e | grep 153B
$ sudo modprobe e1000e
$ dmesg | grep e100
[16102.093168] e1000e: Intel(R) PRO/1000 Network Driver - 0.3.3.3-k6
[16102.093169] e1000e: Copyright (c) 1999-2008 Intel Corporation.

[chili555]

modinfo e1000e | grep 153B

When it comes back empty, that tells us the device ID isn't listed in the Ubuntu version you installed, 12.04 LTS. You could install Ubuntu 13.04 and be all set. You could compile and install the latest version of e1000e. That requires several prerequisites that are very difficult to install without a working internet connection.

Do you have or can you borrow a working wireless device?

[Stephen Vincent]

When it comes back empty, that tells us the device ID isn't listed in the Ubuntu version you installed, 12.04 LTS. You could install Ubuntu 13.04 and be all set. You could compile and install the latest version of e1000e. That requires several prerequisites that are very difficult to install without a working internet connection.

Do you have or can you borrow a working wireless device?

I'll try installing 13.04: looks like the most attractive option. Thanks for the help.

[Stephen Vincent]

Upgrading to 13.04 did the trick! Thanks again.