My value add will be to introduce as much clarity to the process as I can to what worked for me.
Prerequisites (silly as some may seem):
The Toshiba has a built-in toggle switch mid-way under the front edge of lighting that enables wireless. You can tell its activated when an orange LED is lit just under the edge of the front of the unit. Make sure its on.
You will need to have a wired internet connection to update the system and to download wireless application necessities. Connect your laptop until wireless installation is completed.
Many instructions talk about the Atheros Hardware access Layer (HAL) driver found under System->Hardware Drivers. It can be disabled or enabled. If enabled it will simply say Not in use after we're done.
Let's be sure that the system is up-to-date. Open up a command line terminal (application-> Accessories -> Terminal) and type:
sudo apt-get install build-essential
In that same Terminal window type: ifconfig
You will get a series of lines about network devices.
The important line we are looking for looks like: eth0 Link encap:Ethernet HWaddr nn:nn:nn:nn:nn:nn
The hexadecimal numbers in the nn:nn:nn:nn:nn:nn sequence are the MAC address for your wireless card. Write this down and put it to one side.
In the same terminal window type: pwd
This will show you your home directory - something like home/your_name
This is where we will move all our downloaded software.
Make sure your browser preferences send downloads to your desktop.
Now we will prevent the default driver from intercepting our desired driver. In the Terminal window type exactly:
echo "blacklist ath_pci" | sudo tee -a /etc/modprobe.d/blacklist
Close your terminal window.
Download the following to your desktop (so we can see that we have the right stuff).
Open firefox and go to:
You will be asked to save the file so do so.
Click on Downloads and download the latest stable version of the product.
Close your browser. You should now see two tar files on your desktop.
On the main Ubuntu menu click Places->Home which will open up your home directory. Drag and drop both tar files there.
Open another Terminal window. You will be in your home directory. We will now install the 64-bit wireless driver and the application.
tar xvf ar5007eg-*.tar.gz
tar xvf ndiswrapper-1.53.tar.gz
In both these commands the file names must match the file names of the tar files you downloaded.
sudo aptitude update
sudo aptitude install linux-headers-$(uname -r) build-essential
sudo apt-get install ndisgtk
Install the wireless driver:
On the Ubuntu menu, click System->Administration->Windows Wireless Drivers
Her you will click Install New Driver and navigate to the ar5007eg-64-0.2/ar5007eg directory that holds the net5211.inf file. Click on the .inf file.
In the terminal type:
sudo gedit /etc/network/interfaces
Once in the file add the following line:
pre-up/sbin/ifconfig wlan0 hw ether nn:nn:nn:nn:nn:nn
where the nn:nn:nn:nn:nn:nn sequence is the MAC address you captured from your machine at the very beginning of these instructions. Save the file.
If you have difficulty saving the file go to the /etc/network directory and change the permissions on the interfaces file using chmod to let you write to the file.
Disconnect the hard wire internet connecton. Restart the system.
After the restart, on the Ubuntu menu, locate the internet connection micro-icon (a set of bars or repeating terminals) and set it to wireless.This worked beautifully in my experience.