Ubuntu
network-manager package

  1. Intrepid (8.10)
  2. Bug #279262
  3. Comment #102

Comment 102 for bug 279262

Revision history for this message
Ronnie Redd (cruzit) wrote : Re: [regression] devices/interfaces not set to "auto" in /etc/network/interfaces get blacklisted in 0.7 (intrepid) but were managed in 0.6 (hardy and before)

Those who need a static ip
Change your /etc/resolv.conf to something like below (replace the x's with ip addresses of your dns servers)
with the command:
sudo gedit /etc/resolv.conf

#/etc/resolv.conf
search yourdomain
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx

Change your /etc/network/interfaces to something like below (replace the x's with your ip addresses and gateways)
with the command:
sudo gedit /etc/network/interfaces
#/etc/network/interfaces
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address xxx.xxx.xxx.xxx
netmask 255.255.255.0
gateway xxx.xxx.xxx.xxx

auto eth1
iface eth1 inet static
address xxx.xxx.xxx.xxx
netmask 255.255.255.0
gateway xxx.xxx.xxx.xxx

After that restart networking and your dns issues should be resolved.
sudo /etc/init.d/networking restart

Make sure you get rid all the extra things in that mysteriously appeared in the upgrade from 8.04 to 8.10
All that being said, it is advised to stay away from network manager until these issues are resolved. If you attempt to change things w/ network manager and do a reboot, the resolv.conf file may be written over to be blank.