Email clients (tested with KMail and Thunderbird) fail to reconnect when my laptop has been suspended and moved to a different location and then resumed. Wifi reconnects just fine and I can use any browser, but tested email programs fail to connect to IMAP servers.
KMail usually shows a message about retrieving folders for namespace whereas Thunderbird just "hangs". KMail works somewhat better as network activity can be canceled and restarted within the program whereas Thunderbird needs to be terminated and restarted.
Here is an old KDE bug https://bugs.kde.org/show_bug.cgi?id=74484 but this does not only affect KMail.
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: network-manager 0.8.4~git.20110319t175609.d14809b-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Thu Jun 9 18:09:56 2011
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha amd64+mac (20110325)
IpRoute:
192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.6 metric 2
169.254.0.0/16 dev wlan0 scope link metric 1000
default via 192.168.0.1 dev wlan0 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: No upgrade log present (probably fresh install)
Assigning a package.