[Bug 1023486] [NEW] Cannot resolve domain names if eth0 is in /etc/network/interfaces

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I installed two systems with Quantal via a preseed. After booting,
neither of them could connect to the web. A workaround was to remove the
eth0 section from /etc/network/interfaces (which the preseed added).
This is the interfaces file before:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

After restarting network-manager service it worked again immediately.

It was also suggested that the state of resolv.conf on the system might
be a problem:

nameserver 209.6.3.210
nameserver 127.0.0.1
search lexenab

Removing nameserver 127.0.0.1 and restarting networking/resolvconf and
network-manager seemed to fix it.

(having looked at the resolv.conf file after it worked again the
127.0.0.1 is back, which is interesting)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager 0.9.4.0+git201206081144.2efeac8-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-4.4-generic 3.5.0-rc6
Uname: Linux 3.5.0-4-generic x86_64
ApportVersion: 2.3-0ubuntu4
Architecture: amd64
Date: Wed Jul 11 11:41:31 2012
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120711.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: resolvconf (Ubuntu)
     Importance: Undecided
         Status: Incomplete


** Tags: amd64 apport-bug quantal running-unity
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Cannot resolve domain names if eth0 is in /etc/network/interfaces
https://bugs.launchpad.net/bugs/1023486
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