[Bug 1000244] Re: /etc/resolv.conf symlink does not exist after initial installation of resolvconf package

Tue Oct 23 20:25:48 UTC 2012

On Tue, Sep 18, 2012 at 5:43 PM, Thomas Hood <1000244 at bugs.launchpad.net> wrote:
> @Cerin: We need to find out which program it is that is not interfacing
> correctly with resolvconf.
>
> So far as I know all Ubuntu software interfaces correctly with
> resolvconf. It is known that some third party software doesn't interface
> correctly with resolvconf.  Are you using a VPN client?  Which one?
>
> When resolv.conf is incorrect, what is the output of these commands?
>
>     ls -l /etc/resolv.conf
>     cat /etc/resolv.conf
>     ls -l /run/resolvconf
>     ls -l /run/resolvconf/interface
>     for F in /run/resolvconf/interface/* ; do echo === $F === ; cat $F ; done
>     ls -l /etc/resolvconf/resolv.conf.d
>     for F in /etc/resolvconf/resolv.conf.d/* ; do echo === $F === ; cat $F ; done
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1000244
>
> Title:
>   /etc/resolv.conf symlink does not exist after initial installation of
>   resolvconf package
>
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Sorry for the late reply. I was waiting for when the problem
reoccurred. I've isolated the scenario that I can reproduce. My
resolvconf info is always wrong with I switch from wired to wireless.

In response to your question, when resolv.conf is incorrect, this is
the output of your commands:

chris at localhost:~$ ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 29 Sep 17 10:57 /etc/resolv.conf ->
../run/resolvconf/resolv.conf
chris at localhost:~$ cat /etc/resolv.conf
# Generated by NetworkManager
domain home
search home
nameserver 127.0.0.1
chris at localhost:~$ ls -l /run/resolvconf
total 4
-rw-r--r-- 1 root root  0 Oct 12 20:36 enable-updates
drwxr-xr-x 2 root root 60 Oct 12 20:47 interface
-rw-r--r-- 1 root root 75 Oct 12 20:47 resolv.conf
chris at localhost:~$ ls -l /run/resolvconf/interface
total 4
-rw-r--r-- 1 root root 45 Oct 12 20:47 NetworkManager
chris at localhost:~$ for F in /run/resolvconf/interface/* ; do echo ===
$F === ; cat $F ; done
=== /run/resolvconf/interface/NetworkManager ===
domain home
search home
nameserver 127.0.0.1
chris at localhost:~$ ls -l /etc/resolvconf/resolv.conf.d
total 8
-rw-r--r-- 1 root root   0 Mar 29  2012 base
-rw-r--r-- 1 root root 151 Mar 29  2012 head
-rw-r--r-- 1 root root 147 May 10 14:55 original
chris at localhost:~$ for F in /etc/resolvconf/resolv.conf.d/* ; do echo
=== $F === ; cat $F ; done
=== /etc/resolvconf/resolv.conf.d/base ===
=== /etc/resolvconf/resolv.conf.d/head ===
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
=== /etc/resolvconf/resolv.conf.d/original ===
# Generated by NetworkManager
domain mynetwork
search mynetwork
nameserver 10.157.10.12
nameserver 10.157.10.14
nameserver 192.168.1.1

When I use the Gnome widget to disable and then re-enable my wireless
connection, the resolv.conf info is corrected.

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https://bugs.launchpad.net/bugs/1000244

Title:
  /etc/resolv.conf symlink does not exist after initial installation of
  resolvconf package

Status in “resolvconf” package in Ubuntu:
  Incomplete

Bug description:
  I upgraded an 11.10 install to 12.04, and now I'm unable to resolve
  domain names because Network Manager does not populate my
  /etc/resolv.conf file.

  For example, my local wireless router uses the domain "mylocaldomain"
  and nameservers 10.157.10.12 and 10.157.10.14, so in 11.10, after
  connecting to the router I would see this in my /etc/resolv.conf:

  domain mylocaldomain
  search mylocaldomain
  nameserver 10.157.10.12
  nameserver 10.157.10.14

  Now /etc/resolv.conf contains the settings last set before I upgraded
  to 12.04, and doesn't update them for whatever network I'm currently
  on. I have to manually guess the settings and modify /etc/resolv.conf
  in order to resolve domain names.

  I believe this may be related to
  https://bugs.launchpad.net/ubuntu/+source/resolvconf/+bug/922677 and
  how the "resolvconf" program has been introduce to manage this. I
  believe this is a new bug with how prior installs are improperly
  upgraded.

  I tried removing the line "dns=dnsmasq" from
  /etc/NetworkManager/NetworkManager.conf and then running `sudo restart
  network-manager`, but that had no effect.

  I tried running `resolvconf --enable-updates` but I get the error
  "resolvconf: Error: /etc/resolv.conf isn't a symlink, not doing
  anything."

  Based on https://help.ubuntu.com/12.04/serverguide/network-
  configuration.html#name-resolution, I tried establishing this symlink
  myself, but the file /run/resolvconf/resolv.conf does not exist on my
  system.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: network-manager 0.9.4.0-0ubuntu4
  ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
  Uname: Linux 3.2.0-24-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.0.1-0ubuntu7
  Architecture: amd64
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Wed May 16 09:57:25 2012
  IfupdownConfig:
   auto lo
   iface lo inet loopback
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64+mac (20111012)
  IpRoute:
   default via 192.168.1.1 dev eth2  proto static 
   169.254.0.0/16 dev eth2  scope link  metric 1000 
   192.168.1.0/24 dev eth2  proto kernel  scope link  src 192.168.1.205  metric 2 
   192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
  NetworkManager.state:
   [main]
   NetworkingEnabled=true
   WirelessEnabled=true
   WWANEnabled=true
   WimaxEnabled=true
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to precise on 2012-05-10 (5 days ago)
  nmcli-dev:
   DEVICE     TYPE              STATE         DBUS-PATH                                  
   eth2       802-11-wireless   connected     /org/freedesktop/NetworkManager/Devices/1  
   eth0       802-3-ethernet    unavailable   /org/freedesktop/NetworkManager/Devices/0
  nmcli-nm:
   RUNNING         VERSION    STATE           NET-ENABLED   WIFI-HARDWARE   WIFI       WWAN-HARDWARE   WWAN      
   running         0.9.4.0    connected       enabled       enabled         enabled    enabled         enabled

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