I just installed ubuntu 11.10 but my computer will not connect to the internet, what can I do?

Also, I've even tried switching cable ports on my router. The port that the ethernet cable is plugged into right now is the port I used moments ago for someone elses computer and that connected just fine so the problem is not the connection, it is the operating system. I need help!

type " lspci -v " in terminal and reply the output. make sure that drivers are installed for your network interface. also try wifi to connect.

Same problem here. Just upgraded to 11.10 today and found that 11.10 can not recognize my internet connection. Luckely, I have version 10.04 on same PC and here is no trouble connecting. Guess the problem is with the way 11.10 recognize internet.

Do you still have the issue ?

Tried to fix connection, but been unable to locate values for netmask and gateway on 10.04 version.

Not expert on Internet.
Could you try to find those data with command ifconfig

On command ifconfig get following answer: Please advice.
eth0 Link encap:Ethernet HWaddr 00:e0:4d:72:85:e6
          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)
          Interrupt:23

eth7 Link encap:Ethernet HWaddr 98:f5:37:22:f3:19
          inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
          inet6 addr: fe80::9af5:37ff:fe22:f319/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
          RX packets:1730 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1933 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1023371 (1.0 MB) TX bytes:355406 (355.4 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:16436 Metric:1
          RX packets:38 errors:0 dropped:0 overruns:0 frame:0
          TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2864 (2.8 KB) TX bytes:2864 (2.8 KB)

netmask: 255.255.255.0
gateway: probably 192.168.1.1 as usual (you are number 2)
Your network works with Live CD 10.04 but not with installed 11.10.
Does your wired connection work with Live CD 11.10 (perhaps configuration issue) ?

Have tried to configure setup connection, followed the steps careful but without success.
Did a ifconfig on version 11.10 and got following result.

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:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:240 (240.0 B) TX bytes:240 (240.0 B)

Looks to me that eth0 and eth7 is missing, must have been here before the upgrade to 11.10, version 11.04 connected without problems.

Is it possible to copy eth0 and etc7 values from version 10.04 to 11.10??

Can you connect to router with its IP address (e.g. http://192.168.1.1)? Address can be printed on a label at back of router.

On version 11.10, a http://192.168.1.1 request gives server not found
On version 10.04 the answer is: A username and password are being requested by http://192.168.1.1. The site says: "DSL Router"

Perhaps I should trow in the towel, and try to get a service engineer from my internet provider to try to restore connection. This is a lesson for me of not being to quick with updates, better let every new version go through an extended period of testing and bugs removal before considering updating.

i personally use ubuntu 11.10 and can easily access my router settings
with user name and password by entering 192.168.1.1 in the address
bar.....the problem may be somewhere else......try connecting with usb
if your modem supports or use a USB modem if available just to check
whether you can access internet like this.

The problem is probably not from Internet provider side, but from router or Ubuntu side.
Did you connect with router via USB or Ethernet ?
What is model of router and which is Internet provider ?

Version 10.04 connects either via USB or LAN, as did Version 11.04. Therefore the problem is not with router or provider as I see it, but with version 11.10.

Could you provide result of command:
   sudo lshw -C network

The sudo lshw -C network on version gave:
hans@hans-desktop:~$ sudo lshw -C network
  *-network DISABLED
       description: Ethernet interface
       product: VT6102 [Rhine-II]
       vendor: VIA Technologies, Inc.
       physical id: 12
       bus info: pci@0000:00:12.0
       logical name: eth0
       version: 7c
       serial: 00:e0:4d:72:85:e6
       size: 10Mbit/s
       capacity: 100Mbit/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=via-rhine driverversion=1.4.3 duplex=half latency=32 link=no maxlatency=8 mingnt=3 multicast=yes port=MII speed=10Mbit/s
       resources: irq:23 ioport:d000(size=256) memory:fdffe000-fdffe0ff
  *-network DISABLED
       description: Ethernet interface
       physical id: 1
       logical name: eth2
       serial: 98:f5:37:22:f3:19
       capabilities: ethernet physical
       configuration: broadcast=yes driver=cdc_ether driverversion=22-Aug-2005 firmware=CDC Ethernet Device link=yes multicast=yes
hans@hans-desktop:~$ sudo 'do-release-upgrade'
                                                                              ----------------------------------
Same command on version 10.04 gave:
  *-network
       description: Ethernet interface
       product: VT6102 [Rhine-II]
       vendor: VIA Technologies, Inc.
       physical id: 12
       bus info: pci@0000:00:12.0
       logical name: eth0
       version: 7c
       serial: 00:e0:4d:72:85:e6
       size: 10MB/s
       capacity: 100MB/s
       width: 32 bits
       clock: 33MHz
       capabilities: pm bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=via-rhine driverversion=1.4.3 duplex=half latency=32 link=no maxlatency=8 mingnt=3 multicast=yes port=MII speed=10MB/s
       resources: irq:23 ioport:d000(size=256) memory:fdffe000-fdffe0ff
  *-network
       description: Ethernet interface
       physical id: 1
       logical name: eth7
       serial: 98:f5:37:22:f3:19
       capabilities: ethernet physical
       configuration: broadcast=yes driver=cdc_ether driverversion=22-Aug-2005 firmware=CDC Ethernet Device ip=192.168.1.2 link=yes multicast=yes
hans@hans-desktop:~$ ping 203.130.206.250 -t

With fourth top right icon, could you try to enable network ?

Click icon, drop down meny have check mark at enable network, when selected get info that network is now disconnected.

sudo lshw -C network on version 11.10 gave:
 logical name: eth2
Ethernet Device link=yes multicast=yes

sudo lshw -C network on version 10.04 gave:
 logical name: eth7
Ethernet Device ip=192.168.1.2 link=yes multicast=yes

Slightly different, don't know if it is significant

In 10.04, you got a local address given by router: 192.168.1.2
In 11.10, you get any address and so PC is unknown on network. In network parameter, check DHCP automatic is set to get IP address.

You can also try the following forums:
   http://ubuntuforums.org/
   http://askubuntu.com/faq#close
   http://www.linuxquestions.org/

delance@delance-desktop on Ubuntu 11.10 :~$ sudo lshw -C network
  *-network
       logical name: eth0
       configuration: autonegotiation=on broadcast=yes driver=forcedeth driverversion=0.64 duplex=full ip=192.168.1.2 latency=0 link=yes maxlatency=20 mingnt=1 multicast=yes port=MII speed=100Mbit/s
You should get an IP address.
I suspect the issue is in driver, but it's outside my knowledge.

Thanks for your help, just one last question. Do you think it would help if I repeated the upgrade to 11.10 from a disc, if it is a driver problem.

Theoretically no, as the disc will use same drivers as update-manager.
But frequently, upgrade from disc has less issue than update via network.