Since I did a fresh install of Hardy Heron 19 days ago and realized that the wifi driver for my Intel 3945ABG chipset has been changed, I've been resorting to a wired connection. This involved buying 35m of network cable, and consequently lugging them around the house whenever I need to move. It also meant no Ubuntu at make-shift office [read: coffee houses] . I read endless posts and fiddled with files & settings and adding lines of codes to files I had no idea what they are or what they did - all that proved futile.
Today I came across a post on the Ubuntu Forums that did the trick for me. In a terminal, follow the following commands:
First off disable the iwl3945 driver
modprobe -r iwl3945
Then re-enable it
modprobe iwl3945
Activate the wireless interface
ifconfig wlan0 up
Create a file to contain the new settings
sudo gedit /etc/modrobe.d/iwl3945
The file iwl3945 doesn't exist yet, but we just created it. Paste the following two lines in the newly created file:
alias wlan0 iwl3945 options iwl3945 disable_hw_scan=1
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