** Summary changed: - network-manager/dnsmasq causes slow dns resolution after changing networks + networking slow after changing networks while machine suspended
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/978957 Title: networking slow after changing networks while machine suspended Status in “network-manager” package in Ubuntu: Incomplete Bug description: If I change networks, for example by suspending my laptop while connected to my work subnet on 192.168.10.x and resuming so that I connect to my home network on 10.1.1.x, the network becomes very sluggish for anything that requires dns resolution. For instance, just typing the 'route' command takes a long time to complete (normally it is instantaneous); pings take a long time; and google-earth reports network errors. My guess is that dnsmasq-base is causing this. /etc/resolv.conf contains only "nameserver 127.0.0.1", and it seems likely that dnsmasq is retaining the old (invalid) dns information and only trying the newly-acquired (correct) dns server after the first one times out. sudo dhclient doesn't help (it just complains that a file already exists and suggests that I can restart smbd with the restart command). A reboot fixes the problem, but it is ridiculous to have to do this. Unfortunately network-manager now depends on dnsmask-base, so it isn't possible to remove it. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: network-manager 0.9.4.0-0ubuntu2 Uname: Linux 3.4.0-rc2-git-20120410.1707 x86_64 ApportVersion: 2.0.1-0ubuntu1 Architecture: amd64 Date: Wed Apr 11 22:02:17 2012 EcryptfsInUse: Yes IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) IpRoute: default via 10.1.1.1 dev eth0 proto static 10.0.0.0/8 dev eth0 proto kernel scope link src 10.1.1.11 metric 1 10.0.0.0/8 dev wlan0 proto kernel scope link src 10.1.1.8 metric 2 169.254.0.0/16 dev eth0 scope link metric 1000 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: LANGUAGE=en_AU:en TERM=xterm PATH=(custom, no user) LANG=en_AU.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: Upgraded to precise on 2012-03-02 (40 days ago) nmcli-dev: DEVICE TYPE STATE DBUS-PATH eth0 802-3-ethernet connected /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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/978957/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
