Ethernet Disabled

[ubunteshwar]

I have been using only wireless for a long time but I am sure the ethernet worked some time but now it does not. I recently did a clean install of Precise. I dont know if that broke the ethernet. Wireless works fine but I need ethernet at a place where there is no wireless.

lt1:~$ sudo lshw -class network
*-network
description: Wireless interface
product: BCM4312 802.11b/g LP-PHY
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth2
version: 01
serial: 00:21:00:8d:8d:53
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=wl0 driverversion=5.100.82.38 ip=10.0.0.3 latency=0 multicast=yes wireless=IEEE 802.11bg
resources: irq:16 memory:db600000-db603fff
*-network DISABLED
description: Ethernet interface
product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: eth0
version: 02
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=N/A latency=0 link=no multicast=yes port=MII speed=100Mbit/s
resources: irq:47 ioport:6000(size=256) memory:d1410000-d1410fff memory:d1400000-d140ffff memory:d1420000-d142ffff


If I go to System Settings - Network, I see Wired as Unmanaged and has hardware address 00:00:00:00:00:00

How do I fix this? Thanks

[chili555]

Let's have a look at:

cat /etc/network/interfaces
dmesg | grep eth0

Thanks.