I have the exact same problem. The workaround mentioned here works after several attempts!
-- 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/899462 Title: frequently Wireless network connects but can't ping, disabling and re- enabling network manager fixes Status in “network-manager” package in Ubuntu: New Bug description: I have a 802.11N wireless network and frequently when I boot it connects but I can't connect to anything even my router. Disabling and re-enabling networking in network manager usually fixes it but sometimes it takes multiple tries. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: network-manager 0.9.1.90-0ubuntu5 ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6 Uname: Linux 3.0.0-13-generic x86_64 ApportVersion: 1.23-0ubuntu4 Architecture: amd64 CRDA: Error: [Errno 2] No such file or directory Date: Sat Dec 3 09:33:36 2011 Gconf: IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012) 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 192.168.1.155 metric 2 Keyfiles: Error: [Errno 2] No such file or directory NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/899462/+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
