Wireless Network Authentication repeated requests

Hello Chrisrob,
What type of authentication are you using? This sounds like you are using the incorrect password for your wireless encryption. Are you able to change your password from the access point/router to something new and test using that new password in your wifi setting?

You may also want to check keyrings, maybe it's not saving the password

I'm obviously using the correct password (which is fixed and printed on the router) as it connects when I enter it - even though it's set to automatically connect, which it used to do.
But, even though it's connected, it will frequently pop up the window requesting authentication again. I cannot ignore it (even though it is still connected) as the window stays on top of whatever I'm trying to do. If I cancel it, it disconnects me so I have to continually re-enter it. It's done it 5 times while I've tried to type this reply!

Can you please confirm your Ubuntu version?
https://help.ubuntu.com/community/CheckingYourUbuntuVersion

Can you also please open terminal and provide the output of the following command
nm-tool && lsb_release -a && lspci | grep Network

Have you tested deleting the Wireless connection from the network manager and adding it back?

Using Ubuntu 11.10 on a notebook computer.

chris@mini:~$ nm-tool && lsb_release -a && lspci | grep Network

NetworkManager Tool

State: connected (global)

- Device: eth1 [Auto TALKTALK-3D9264] -----------------------------------------
  Type: 802.11 WiFi
  Driver: wl
  State: connected
  Default: yes
  HW Address: F0:7B:CB:56:9D:C3

  Capabilities:
    Speed: 54 Mb/s

  Wireless Properties
    WEP Encryption: yes
    WPA Encryption: yes
    WPA2 Encryption: yes

  Wireless Access Points (* = current AP)
    MDL WiFi SPARK HotSpot 1: Infra, 00:02:6F:7C:BB:85, Freq 2437 MHz, Rate 0 Mb/s, Strength 30
    TALKTALK-7B016B: Infra, 1C:AF:F7:7B:01:6B, Freq 2412 MHz, Rate 54 Mb/s, Strength 24 WPA WPA2
    SKY93444: Infra, 00:1B:2F:91:72:26, Freq 2437 MHz, Rate 54 Mb/s, Strength 19 WPA
    BTHomeHub-F9D3: Infra, 00:14:7F:A3:B0:5E, Freq 2442 MHz, Rate 54 Mb/s, Strength 20 WEP
    BTOpenzone-H: Infra, 02:14:7F:A3:B0:5F, Freq 2442 MHz, Rate 54 Mb/s, Strength 19
    *TALKTALK-3D9264:Infra, B4:74:9F:3D:92:6C, Freq 2447 MHz, Rate 54 Mb/s, Strength 100 WPA WPA2
    SysCaptain: Infra, 00:3A:99:11:7B:80, Freq 2447 MHz, Rate 54 Mb/s, Strength 29 WEP
    AOLBB-C46482: Infra, 1C:1D:67:C4:64:85, Freq 2422 MHz, Rate 0 Mb/s, Strength 30 WPA WPA2
    Monty: Infra, 00:0F:B5:56:72:0E, Freq 2452 MHz, Rate 54 Mb/s, Strength 45 WPA

  IPv4 Settings:
    Address: 192.168.1.2
    Prefix: 24 (255.255.255.0)
    Gateway: 192.168.1.1

    DNS: 192.168.1.1

- Device: eth0 -----------------------------------------------------------------
  Type: Wired
  Driver: r8169
  State: unavailable
  Default: no
  HW Address: 00:26:B9:AD:26:C8

  Capabilities:
    Carrier Detect: yes
    Speed: 10 Mb/s

  Wired Properties
    Carrier: off

- Device: wlan2 ----------------------------------------------------------------
  Type: 802.11 WiFi
  Driver: rtl8192cu
  State: disconnected
  Default: no
  HW Address: 00:A1:B0:72:D1:A4

  Capabilities:

  Wireless Properties
    WEP Encryption: yes
    WPA Encryption: yes
    WPA2 Encryption: yes

  Wireless Access Points

No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric
03:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
chris@mini:~$ ^C
chris@mini:~$

Have you tested clicking on the Network icon in the top right hand corner, clicking on Edit Connections and deleting all Wifi connections and then adding your connection back?

Have you looked in the Passwords and encryption keys /keychain/keyring tool to see if your wireless password entrys are listed there and deleted them? You can get there by opening dash and searching for Password.

Have you tested installing wicd from the ubuntu software center to see if this issue occurs in that network manager also?

Thanks for all your help and suggestions.

I have looked at passwords and it's not listed. I have removed connections and added.

I have installed wicd.

It may be OK as it hasn't asked for password key again yet. If it does, I may go for a re-install. It's my no.2 machine which had had Windows 7 on it. When I changed to Ubuntu (removing Windows & reformatting first), I was delighted on how much faster it was.

Cheers

Chris