Does restarting network-manager always solve the problem?
sudo restart network-manager
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https://bugs.launchpad.net/bugs/994963
Title:
DNS stops working after some time
Status in “network-manager” package in Ubuntu:
New
Bug description:
Clean install of 12.04 and it works fine. After few hours, DNS
suddenly stops working, no application can resolve domain names. If I
manually put my ISP's nameserver (124.124.5.141) in /etc/resolv.conf
things start working again. Remove it, and again no resolutions.
Something's wrong with nm's dnsmasq I guess.
Here are some things that might be useful-
shaan@shaan-laptop:~$ cat /run/nm-dns-dnsmasq.conf
server=124.124.5.141
server=124.124.5.140
server=124.124.5.136
shaan@shaan-laptop:~$ cat /etc/resolv.conf
# 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
nameserver 127.0.0.1
I use a wirless router to connect to my ISP. Let me know if any other
info is needed.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.4.0-0ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
Date: Sat May 5 11:25:38 2012
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Kubuntu 12.04 LTS "Precise Pangolin" - Release i386
(20120423)
IpRoute:
default via 192.168.1.1 dev wlan0 proto static
169.254.0.0/16 dev wlan0 scope link metric 1000
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.100
metric 2
NetworkManager.state:
[main]
NetworkingEnabled=true
WirelessEnabled=true
WWANEnabled=true
WimaxEnabled=true
ProcEnviron:
LANGUAGE=en_IN:en
TERM=xterm
PATH=(custom, no user)
LANG=en_IN
SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-dev:
DEVICE TYPE STATE DBUS-PATH
eth0 802-3-ethernet unavailable
/org/freedesktop/NetworkManager/Devices/1
wlan0 802-11-wireless connected
/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 disabled
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