I had the same problem with the firmware not supporting detected chipset for D-Link DWA-140 B2 in Natty and I've managed to resolve it by blacklisting rt2800usb module in /etc/modprobe.d/blacklist.conf.
I had the same problem with the firmware not supporting detected chipset for D-Link DWA-140 B2 in Natty and I've managed to resolve it by blacklisting rt2800usb module in /etc/modprobe. d/blacklist. conf.