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Monday
Nov032008

Ubuntu 8.10 Network Problem

Yesterday I installed Ubuntu 8.10 (Intrepid Ibex) on my Thinkpad R50e laptop.  This time I decided to do a complete install rather than just an upgrade because I wanted to get rid of several years of accumulated cruft.  I did remember to first back up the files I wanted to keep, though.  I downloaded the .iso image file from here and following the instructions here, I burnt it to a CD.  I then put the CD into the laptop and rebooted.  The installation was pretty simple and quick (it took only about an hour or so, whereas I remember upgrades taking several hours). There is a good overview of the installation process here.  However, when I booted up the new installation, the wired network connection was not working.  I wasn't even able to ping the ADSL modem router.

A bit of googling (from my other computer) revealed that the problem was probably a bug in NetworkManager 0.7, which is a new package in Ubuntu 8.10.  A work-around was recommended here.  Following this work-around I first disabled NetworkManager from starting up by opening a terminal and entering:

sudo update-rc.d -f NetworkManager remove

I then rebooted the laptop.

Then I opened another terminal and opened the /etc/network/interfaces file in an editor:

sudo gedit /etc/network/interfaces

This file already contained the lines:

auto lo

iface lo inet loopback

To the end of this file I added these lines:

auto eth0

iface eth0 inet dhcp

I then saved /etc/network/interfaces and exited the editor.

My /etc/resolv.conf file already contained the required line:

nameserver 10.0.0.2

So I rebooted the laptop again and the network connection was working properly: I was able to ping the modem router and connect to the web.

Reader Comments (1)

It worked for me. Thank you.
Following the procedure the network icon disappeared from the right side of the top toolbar, but the network works.

Cheers,

John
November 18 | Unregistered CommenterJohn Zatyko

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