First off, I did NOT use the drivers that came on the CD (v2.0.939.20100726) which are the same ones listed currently on the Edimax website, apparently dated 2010/7/26 based on the version tag.
I used the latest RTL8192CU Linux drivers from Realtek.
Possible prerequisite: Some have suggested installing the build-essential package in Ubuntu... I already had this installed so I don't know if it's necessary: In a terminal window do:
sudo apt-get install build-essential
1. Download RTL8192CU Linux drivers from Realtek website.
2. Right-click the archive and select Extract Here.
3. Open a Terminal window (Applications > Accessories > Terminal)
4. Assuming the file was downloaded to your Downloads folder, type:
cd Downloads/RTL (then press Tab and it will auto-complete the folder name)
5. Run the install script:
sudo sh install.sh
6. Enter your password.
7.
That's it!