I've got a fairly fresh install (a month old) of Kubuntu without much modification done to it and I'm having massive issues connecting to any wireless network. The computer can see the networks available and on trying to connect to my home network it will get to Setting Network Address before waiting for a while and then cutting the connection.

Sometimes the connection works, most of the time it doesn't. I've got this script which sometimes helps, but sometimes doesn't:

sudo ifconfig wlan0 down

sudo dhclient -r wlan0

sudo ifconfig wlan0 up

sudo dhclient wlan0

I don't really know too much about how to troubleshoot this issue (I'm a bit of a *ubuntu noob) - can anyone help?

here's my wifi card info :

   description: Wireless interface

   product: Centrino Advanced-N 6205

   vendor: Intel Corporation

   physical id: 0

   bus info: pci@0000:03:00.0

   logical name: wlan0

   version: 34

   serial: a0:88:b4:58:d1:c4

   width: 64 bits

   clock: 33MHz

   capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless

   configuration: broadcast=yes driver=iwlagn driverversion=2.6.38-10-generic firmware=17.168.5.2 build 35905 ip=192.168.2.53 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn

   resources: irq:48 memory:f2500000-f2501fff