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[Olupot Douglas <olupotd3@xxxxxxxxx>]

*** This bug is a duplicate of bug 539300 ***
    https://bugs.launchpad.net/bugs/539300

I think you should just do a dist-upgrade for the entire system and you should get it up and running.
sudo apt-get update && sudo aptitude full-Upgrade

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https://bugs.launchpad.net/bugs/575844

Title:
  [lucid lynx][dell-wifi] Wireless Disabled for iwl3945

Status in “linux” package in Ubuntu:
  New

Bug description:
  
  Hi All,

  I have Dell Inspiron 1420 with BIOS version A10. I was using Ubuntu 9.04 64-bit and had no issue with Intel 3945ABG wireless card.
  Recently, I have installed Ubuntu 10.04 64-bit (fresh install) and this created the problem with wireless saying "Wireless disabled". I had the similar problem with Ubuntu 9.10 therefore shifted back to 9.04.

  After googling, found some similar issues which were telling to remove
  network-manager and install wicd.

  But still, WICD was not able to detect wireless and could able to scan
  the network only when network-manager was also present. One more weird
  thing was, wicd able to scan and detect wireless connections only when
  I connected the system with eth0 cable. After detection, I could
  unpluged the ethernet cable and start using wlan0 connection.

  Also tried by doing:
  sudo rmmod -f iwl3945
  sudo modprobe iwl3945 disable_hw_scan=1

  http://ubuntuforums.org/showthread.php?t=1420053

  But it also not worked for me.

  After removing "dell-laptop" module and blacklisting the same,
  network-manager starts detecting the wireless connections. wicd also
  able to detect but sometimes starts asking authentication for startup
  (don't know why). My system is running with default kernel (ubuntu
  2.6.32-21-generic) came with ubuntu 10.04.

  Could you please let me know, is there any patch available for this
  issue for ubuntu 10.04. Also, what could be the side-effects of
  removing dell-laptop module.

  Thanks.

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