Connection to WPA2 Enterprise network dropped; dis- and re-enabling networking fixes it

[Jason Frost]

Ubuntu version: 12.04
Package version: 0.9.1.90-0ubuntu5

My college network uses WPA2 Enterprise. Sometimes when I'm connected to it, the connection simply drops, and won't reconnect unless I click the network icon in the top bar, and disable networking, then re-enable it. Only the WPA2 Enterprise network is affected, the WPA2-PSK network connects fine and doesnt have this issue.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: network-manager 0.9.1.90-0ubuntu5
ProcVersionSignature: Ubuntu 3.1.0-2.3-generic 3.1.0
Uname: Linux 3.1.0-2-generic i686
ApportVersion: 1.26-0ubuntu1
Architecture: i386
CRDA: Error: [Errno 2] No such file or directory
Date: Thu Nov 17 03:42:48 2011
Gconf:

InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
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 192.168.1.103 metric 2
Keyfiles: Error: [Errno 2] No such file or directory
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.NetworkManager.NetworkManager.conf:
 [main]
 plugins=ifupdown,keyfile

 [ifupdown]
 managed=true
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2011-10-20T23:00:41.828634
no_proxy: localhost,127.0.0.0/8

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Thomas Hood (jdthood)]

The log file (WifiSyslog.txt) is very long. Can you please indicate where in the log the connection got dropped?