Comment 9 for bug 435874

I installed Kubuntu 9.10 and Ubuntu 9.10. Both had no internet connection. I had numerous errors like no repository sources, errors like 'Requested packages are already installed' when they were not present on the box and many other non-related faults. All were caused by lack of a DNS server connection. After a week of trying various things like disabling ipv6 and getting nowhere (although it did fix Firefox), I did an 'apt-get update' and instead of just failing it resolved to 10.0.0.0 (not my dns server or router). I read that this could be something to do with D-Link routers not supporting ipv6. That problem aside, after some more research I found that the 10.0.0.0 problem relates to the /etc/resolv.conf file being overwritten with some of the info from /etc/dhcp3/dhclient.conf. So to fix it....

su {then enter pass}
nano /etc/dhcp3/dhclient.conf

then edit the following line from....
#prepend domain-name-server 127xxx.xxx.xxx.1, xxx.xxx.xxx.2

to....
prepend domain-name-server 111.222.333.444

(where 111.222.333.444 is *your* DNS server)

then save the file and disconnect and reconnect your wlan0 and/or eth0 interface via the network connection icon on the notification bar/panel. When the interface is up the etc/resolv.conf file still gets overwritten and the incorrect nameserver 10.0.0.0 is still there but the correct DNS server is added _before_ it. Thus the internet (and apt-get etc) now works fine :-D

So you could say this problem is solved. It seems this problem is giving *ubuntu 9.10 a bad name. Let's hope the next version resolves this (pun intended ;-)

Regards,
Guru
http://guru.mameworld.info