I have been searching all day to no avail. I have just installed ubuntu 12.04 as dual boot on a dell optiplex 990, which has a Intel 82579LM NIC. I have it wired up via ethernet to my college network, and it says it is connected to the wired network, yet I have not internet and cannot ping anything. Below I have included some basic checks (pretty much the limit of my knowledge on this subject). It is worth noting that when running windows (it is dual booted) the internet works fine so NIC is fine and so is the ethernet cable itself. I have also downloaded the driver for the NIC from intel and installed on the machine in ubuntu (driver downloaded from here)
I have run the following commands: ifconfig:
aly@neon:~/Downloads/e1000e-2.1.4/src$ ifconfig
eth0 Link encap:Ethernet HWaddr 90:b1:1c:5e:2a:06
inet6 addr: 2001:630:12:1082:92b1:1cff:fe5e:2a06/64 Scope:Global
inet6 addr: 2001:630:12:1075:92b1:1cff:fe5e:2a06/64 Scope:Global
inet6 addr: fe80::92b1:1cff:fe5e:2a06/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6268 errors:0 dropped:0 overruns:0 frame:0
TX packets:172 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:891800 (891.8 KB) TX bytes:36150 (36.1 KB)
Interrupt:20 Memory:e1500000-e1520000
eth0:avahi Link encap:Ethernet HWaddr 90:b1:1c:5e:2a:06
inet addr:169.254.3.202 Bcast:169.254.255.255 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Interrupt:20 Memory:e1500000-e1520000
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:2152 errors:0 dropped:0 overruns:0 frame:0
TX packets:2152 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:137020 (137.0 KB) TX bytes:137020 (137.0 KB)
lspci
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network Connection (rev 04)
ping 8.8.8.8
aly@neon:~/Downloads/e1000e-2.1.4/src$ ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 169.254.3.202 icmp_seq=1 Destination Host Unreachable
From 169.254.3.202 icmp_seq=2 Destination Host Unreachable
From 169.254.3.202 icmp_seq=5 Destination Host Unreachable
From 169.254.3.202 icmp_seq=6 Destination Host Unreachable
From 169.254.3.202 icmp_seq=7 Destination Host Unreachable
From 169.254.3.202 icmp_seq=8 Destination Host Unreachable
And here is a screenshot of the connection information (when connected to the wired network), it seems odd as there is no ipv4 addr