I installed the ndiswrapper kernel module

see more /etc/modprobe.d/ndiswrapper

Now, the the card I have:

Card: D-Link WUA-1340(USB)

• Chipset: Ralink RT73 (RT2571W)
• usbid: 07d1:3c04
• Windows Driver: The newest driver, 3.0, for the DWL-G122 rev C1 can be used. H/W Ver A1, F/W Ver 1.00

Driver

I used the drivers on the usb stick installation CD, run setup.exe (driver directory) with wine to get only two files:

dr71wu.sys
wua1340.inf

Then installed the driver with ndiswrapper 1.47

ndiswrapper -i wua13450.inf

More notes:

• Make sure the network ssid does not contain spaces (problem with the current reading of the /etc/network/interfaces).
• Instead of using the Ubuntu configuration (the icon) I configured everything manually.
• Also the rt73usb tends to be loaded automatically but it does not upport the card correctly so I added to /etc/modprobe.d/blacklist:

blacklist rt73usb

Now we are ready:

sudo rmmod ndiswrapper
sudo rmmod rt73usb
sudo ifdown wlan0
sudo iwconfig wlan0 ap off mode Managed essid NETSSID key XXXXXXXXXX
sudo ifup wlan0
sudo ifdown eth0