I just fought through literally and hour and a half of "Activation (wlan0/wireless): association took too long.", made worse by keyring problems that cause each failure to produce a prompt for the key (not the subject of this bug, that's unrelated.) Adding
[ipv6] method=ignore as suggested above to /etc/NetworkManager/system-connections/Auto XXXX (ssid elided as I'm a guest here) and bouncing NetworkManager to make sure it reread the file (for about the 10th time) immediately stopped the spinloop... so this probably deserves more attention. (The local wifi is WEP with a hex key, on a WRT-54G running factory firmware, which worked fine when this laptop was running Oneiric.) (local system is an x220t) -- 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/997056 Title: WiFi disconnects shortly after connection established Status in “network-manager” package in Ubuntu: Confirmed Bug description: After upgrading from Ubuntu 11.10 to 12.04, wifi connected properly but the connection was dropped again after only ~5s. the problem seems to be related to IPv6. Disabling automatic IPv6 configuration in NetworkManager (see conf file option below) solves the issue for me: /etc/NetworkManager/system-connections/Auto\ ESSID option: [ipv6] method=ignore ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: network-manager 0.9.4.0-0ubuntu3 ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14 Uname: Linux 3.2.0-24-generic i686 ApportVersion: 2.0.1-0ubuntu7 Architecture: i386 Date: Wed May 9 10:13:49 2012 EcryptfsInUse: Yes IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1) IpRoute: default via 94.224.192.1 dev wlan0 proto static 94.224.192.0/20 dev wlan0 proto kernel scope link src 94.224.204.37 metric 2 169.254.0.0/16 dev wlan0 scope link metric 1000 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true ProcEnviron: PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: network-manager UpgradeStatus: Upgraded to precise on 2012-05-08 (0 days ago) mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2012-05-09T09:43:55.538988 nmcli-con: NAME UUID TYPE TIMESTAMP TIMESTAMP-REAL AUTOCONNECT READONLY DBUS-PATH Wired connection 1 7af65225-c8e1-4edd-a039-f799a909d7c4 802-3-ethernet 1336549897 Wed 09 May 2012 09:51:37 AM CEST yes no /org/freedesktop/NetworkManager/Settings/2 Auto wifi51-2 b9f18346-527a-4f08-8c62-77a17b6d8de8 802-11-wireless 1336551051 Wed 09 May 2012 10:10:51 AM CEST yes no /org/freedesktop/NetworkManager/Settings/1 Bongo 6756b39f-4887-471f-8973-8b3f023ceb7e vpn 1334517158 Sun 15 Apr 2012 09:12:38 PM CEST no no /org/freedesktop/NetworkManager/Settings/0 nmcli-dev: DEVICE TYPE STATE DBUS-PATH wlan0 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 disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/997056/+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
