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RAlink RT5390 Wireless 802.11n 1T/1R PCIe in a Compaq Presario CQ56. It had Windows 7 on it orginally. The wireless worked fine. I installed Kubuntu 12.10 amd64 and it still worked fine. The OS offered to upgrade to 13.04 and I let it. That's when the wireless quit working right.
It connects fine if the computer is within 2 or 3 feet of the wireless router. Any further than that and it loses the connection. It can see the network but won't get an IP address.