network-manager drops wifi connection and fails to reconnect

[Stephen Cradock]

Binary package hint: network-manager

Using Ubuntu 11.04 (Natty) with Unity, wifi connection is reliably lost after some time. Network-manager fails to re-establish the connection; nm-applet icon spins interminably. The applet menu shows the access point as "connected", but no connection through to internet is available. Disconnect/reconnect using menu fails. Network-manager requests WEP pass after long delay, but still does not connect. Only solution is to re-start Natty.

Same hardware, same connection - no problem with maverick, no problem with oneiric.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: network-manager 0.8.4~git.20110319t175609.d14809b-0ubuntu3
Uname: Linux 2.6.39-020639rc4-generic x86_64
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Sun Jun 5 18:35:31 2011
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IpRoute:
 default via 192.168.0.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.2 metric 2
Keyfiles: Error: [Errno 2] No such file or directory
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 LANGUAGE=en_US:en
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Mathieu Trudel-Lapierre (cyphermox)]

According to the first log entries in WifiSyslog.txt, the connection would have stopped because no wifi beacons were received for a while. This could be either an issue with the wireless card or with the access point... It's unfortunately very hard to figure out.

Jun 5 18:11:33 localhost NetworkManager[910]: <info> (wlan0): supplicant connection state: completed -> disconnected
Jun 5 18:11:33 localhost kernel: [ 2005.540083] ieee80211 phy0: wlan0: No probe response from AP 00:18:e7:d2:bf:6e after 500ms, disconnecting.
Jun 5 18:11:33 localhost kernel: [ 2005.541611] cfg80211: All devices are disconnected, going to restore regulatory settings

What could be tried would be to install the broadcom driver packages from oneiric on natty, but I'm not sure whether that's really supposed to be doable, or how well that might work.

[Daniel O. Mondaca S. (dnielm)]

Same bug here, don´t know how to get any log...

[suhrawardi (jarra)]

I had a similar issue, and found this post:
http://ubuntuforums.org/showpost.php?s=94998b0f4ccca4791c84f11d054c32e9&p=10492849&postcount=6

Removing the dhcp packages not needed solved at least my prob.

HTH,
Jarra

[splix (igor-artamonov)]

Same issue, start happening week or two ago. Just drops connections, sometimes after 5 minutes, sometimes after few hours, and can't connect until full system restart. Few times a day, it's really annoying :(

Tried with 3 different AP, and 2 wificard (my laptop's internal and an usb wifi)

[Launchpad Janitor (janitor)]

[Expired for network-manager (Ubuntu) because there has been no activity for 60 days.]