Network connection icon randomly disappears

[Feathertail]

PROBLEM

After an apparently-random amount of time, the network connections icon will simply disappear. An active wireless connection will also be terminated at this time.

A wired connection will continue to work. Upon unplugging the ethernet cable, no wireless connection will start up. I have not noticed if the icon remains up until the wire is unplugged or not.

This problem started at some point after I had upgraded to the Natty beta.

HOW TO REPRODUCE

I am not sure. Information about my wireless chipset should be attached. If it is not, please tell me what further information is needed.

EXPECTED BEHAVIOR

Upgrades will not cause regressions in wireless network performance.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: network-manager 0.8.4~git.20110319t175609.d14809b-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic 2.6.38.7
Uname: Linux 2.6.38-10-generic i686
Architecture: i386
CRDA: Error: [Errno 2] No such file or directory
Date: Fri Aug 5 10:11:44 2011
EcryptfsInUse: Yes
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
IpRoute:
 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.64 metric 1
 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.65 metric 2
 169.254.0.0/16 dev wlan0 scope link metric 1000
 default via 192.168.1.254 dev eth0 proto static
Keyfiles: Error: [Errno 2] No such file or directory
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to natty on 2011-04-14 (113 days ago)

Devices are:

Realtek RTL8191SEvA rtl8192
Realtek RTL8101E/RTL8102E r8169

[Thomas Hood (jdthood)]

Any connection between this and bug #520589?

[dino99 (9d9)]

This version is no longer supported; EOL reached since a while.