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I am a new user to Ubuntu, and inherited a laptop with 12.04LTS on it. Neither wired nor wireless internet works. I'd like to get both to work. Here is the output to ifconfig:

lo    Link encap:Local Loopback
      inet addr: Mask:
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING MTU:16436 Metric:1
      RX packets:516 errors:0 dropped:0 overruns:0 frame:0
      TX packets:516 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:41264 (41.2 KB) TX bytes:41264 (41.2 KB)

Can anyone help? Thank you!!

edit: lspci -nn|grep -e 0200 -e 0280 shows:

03:00.0 Ethernet controller [0200]: Broadcom Corporation BCM4401-B0 100Base-TX [14e4:170c](rev 02)
0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
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Please edit your question to add details of your network devices from the terminal command: lspci -nn | grep -e 0200 -e 0280 – chili555 Jan 19 '14 at 1:00
I've updated the question to show the results of lspci -nn|grep -e 0200 -e 0280 Thanks chili! – user237413 Jan 19 '14 at 1:06
up vote 1 down vote accepted

Please hook up the ethernet cable. Open a terminal and do:

sudo modprobe b44

Your ethernet should now be working. Then do:

sudo apt-get remove --purge bcmwl-kernel-source

If it is not installed, that's fine, just proceed:

sudo apt-get update
sudo apt-get install firmware-b43-lpphy-installer

Detach the ethernet, reboot and both devices should now be working.

share|improve this answer
THanks chili555! That solved it – user237413 Jan 19 '14 at 1:47
Awesome! Please accept my answer. – chili555 Jan 19 '14 at 1:54

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