"Network Connections" cannot configure a WiFi connection

[blue balls]

Binary package hint: kdebase-workspace

  I try to configure a WiFi connection using the "Network Connections" applet from KDE "System Settings".

  The problem appears from the start: when I ask the applet to scan for ESSIDS, it shows me no ESSIDS. Therefore I cannot select the one I want and I cannot create the WiFi connection.

  I can list the available wireless networks using "iwlist scanning": the ESSID of my access point is correctly shown.
However the KDE applet doesn't show any ESSID.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: systemsettings 4:4.6.2a-0ubuntu5.1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic i686
Architecture: i386
Date: Sat May 28 20:09:49 2011
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: kdebase-workspace
UpgradeStatus: Upgraded to natty on 2011-04-29 (29 days ago)

[blue balls (blueballs5432)]

  Here is my /etc/network/interfaces file:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
 address 192.168.1.10
 netmask 255.255.255.0
 network 192.168.1.0
 broadcast 192.168.1.255
 gateway 192.168.1.1
 dns-nameservers 212.4.64.139

auto wlan0
iface wlan0 inet dhcp

[blue balls (blueballs5432)]

  Here is a screenshot of the "Network Connection" applet trying to find the available wireless networks and not finding any:

[blue balls (blueballs5432)]

  As I mentioned before the WiFi card is recognized and the drivers are automatically installed:

root@PC2:~/Documents# lsmod | grep rt
parport_pc 32111 0
rt2860sta 494649 0
rt2800pci 18159 0
rt2800lib 43824 1 rt2800pci
crc_ccitt 12595 2 rt2860sta,rt2800lib
rt2x00pci 13986 1 rt2800pci
rt2x00lib 39075 3 rt2800pci,rt2800lib,rt2x00pci
mac80211 257001 3 rt2800lib,rt2x00pci,rt2x00lib
cfg80211 156212 2 rt2x00lib,mac80211
eeprom_93cx6 12653 1 rt2800pci
parport 36746 3 parport_pc,ppdev,lp

    Moreover, the wireless networks are correctly listed by "iwlist scanning", including my own access point.

    In Windows XP, the wireless conenction works without any problems using the same hardware (same network card and same access point).

   All these lead me to believe that the fault lies with the applet "Network Connections".

  Any help will be appreciated.

[Rohan Garg (rohangarg)]

Thanks for taking the time to report this bug. 11.04 reached end of life on October 28, 2012.
Please see this document for currently supported Kubuntu releases:
https://wiki.kubuntu.org/Releases

Unfortunately this means that there will be no more bugfixes for 11.04. It is also recommended that you upgrade, if you have not already.

Please feel free to report any other bugs you may find, and thanks for your understanding.