Thank you for this post! My ASUS USB-N13 B1 (0b05:17ab) wouldn't work on 12.04. This is the post that finally fixed it for me. I was doing everything right except for failing to realize that there was room to scroll down on the Realtek website and select all the variants of this driver they've released.
Originally Posted by steeldriver
It's amazing how well it worked when a newer (correct) version of the drivers is used. In my case the RTL8192CU.
I just grabbed the build-essential package and my linux-headers package, unzipped the drivers and then ran
and the only error it threw was that the driver could not be installed because something was in use. So I disabled networking, ran
sudo chmod u+x ./install.sh
and ran the a second time. It succeeded so I started up networking again my desktop has wireless again for the first time in years.
sudo modprobe -r rtl8192cu