Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am a Comp Sci student and I had to replace my dev laptop with an old Dell Inspiron 1150. First tried loading Ubuntu 13.10 but it wouldn't render graphics correctly on this old machine, so I put on 12.04 LTS instead.

During install from DVD, it recognized internet connection (I had an ethernet cable plugged into my wireless router and the linksys wireless-G adapter plugged into the bus, so I don't know which connection it was using). But now that the OS is installed, it says Network Disconnected and I can't get it to recognize either connection.

the output of

sudo ifconfig


Link encap:Local Loopback
inet addr: Mask
inet6 addr: ::1/128 Scope:Host
RX packets:192 errors:0 dropped:0 overruns:0 frame:0
TX packets:192 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:15744 (15.7 KB) TX bytes:15744 (15.7 KB)

and the results of

sudo lshw -C network


*-network UNCLAIMED
description: Ethernet controller
product: BCM4401 100Base-T
vendor: Braodcom Corporation
physical id: 1
bus info: pci@0000:02:01.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: latency=32
resources: memory:fcffe00-fcffffff memory:fd000000-fd003fff

I manually typed this in, so hoepfully no typos

share|improve this question
"unclaimed" usually means that there is no driver installed - please search here for broadcomm or BCM. – guntbert Nov 30 '13 at 21:54

try requesting a new IP from the DHCP

sudo dhclient -r

releases current

sudo dhclient eth0

Renews IP-address of device.

share|improve this answer
"Cannot find device "eth0"" – blinking-in-the-light Nov 30 '13 at 21:25

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.