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I installed Ubuntu 13.04 while Windows 7 dual booted. I have a Local wired cable connection which is working fine with windows 7, but in the case of Ubuntu it is not working. I try to connect using Network Connections and Ipv4 Settings, in Method option. I use Manual and put all the addresses which my Internet Service Provider has given to me, but whenever I am going to save the Save... button grayed out. I have collected some data regarding this issue. using,

lspci -nnk | grep -iEA3 "(network|wireless|ethernet)"

it shows,

03:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
    Subsystem: AzureWave AW-NB037H 802.11bgn Wireless Half-size Mini PCIe Card [AR9002WB-1NGCD] [1a3b:2c37]
    Kernel driver in use: ath9k
04:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller [1b21:1042]
    Subsystem: ASUSTeK Computer Inc. Device [1043:1059]
--
05:00.0 Ethernet controller [0200]: Qualcomm Atheros AR8151 v2.0 Gigabit Ethernet [1969:1083] (rev c0)
    Subsystem: ASUSTeK Computer Inc. Device [1043:1851]
    Kernel driver in use: atl1c

and

sudo ifconfig

it shows,

eth0      Link encap:Ethernet  HWaddr c8:60:00:43:c7:82  
          inet6 addr: fe80::ca60:ff:fe43:c782/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:985 errors:0 dropped:16 overruns:0 frame:0
          TX packets:32 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:1000 
          RX bytes:71604 (71.6 KB)  TX bytes:6652 (6.6 KB)

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:65536  Metric:1
          RX packets:144 errors:0 dropped:0 overruns:0 frame:0
          TX packets:144 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:11744 (11.7 KB)  TX bytes:11744 (11.7 KB)

wlan0     Link encap:Ethernet  HWaddr 00:08:ca:f0:51:5a  
          UP 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:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

Can anyone suggest how I can fix this and connect to my wired connection?

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You are using static IP or have DHCP service. –  Gaurav Sharma Aug 8 '13 at 11:51
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2 Answers 2

up vote 0 down vote accepted

it seems that you do not have IPV4 address to set this

okay according to your picture do it with another way open terminal first and then type the following

sudo nano /etc/network/interfaces

it will open a file just type it in the file

auto eth0
iface eth0 inet static
    address 192.168.1.100
    netmask 255.255.255.0
    network 192.168.1.0
    broadcast 192.168.1.255
    gateway 192.168.1.1

enter your own ip addresses instead the above save the file

restart network daemons

sudo service network-manager start

or

sudo /etc/init.d/networking restart  

hope this will help

or just if you are not going with static ip just type the following lines in the file

auto eth0
 iface eth0 inet dhcp

save the file and restart network daemons

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If save button is grayed your entry are not correct or you leave some mandatory field blank

example http://ubuntuone.com/4qUEchlo6WX4EBOd5fFKll

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