My current WLAN card (Realtek RTL8191SE Wireless LAN 802.11n PCI-E NIC) is not supported by Backtrack. I need suggestions for a good WLAN card that will work.
Gina Trapani wrote a really good article a while back dealing, in part, with how to find a Backtrack-compatible wireless adapter. In her article (which is available through Lifehacker), she links to a resource containing quite a bit of additional information on the subject:
Essentially, as Bruce mentioned, Linux is the superior platform for deploying a Backtrack installation since it allows for packet injection and not just monitoring.
Here's the compatibility list, from the website above:
In case you are interested in virtualizing an installation of Backtrack (in order to avoid a complicated dual-boot situation), Backtrack.org published installation information here:
Personally I would go with the ALFA AWUS036H. It's one of the best USB WiFi adapters out there and quite inexpensive.
This USB adapter is also reported to be plug & play on BackTrack v5
One thing to be sure of when buying the ALFA's or a G SKY is to make sure it is genuine. I was showing someone an authentication DoS, went to lunch forgetting about it running and came back a few hours later to it. I went to do some more things afterwards with it and noticed my signal strength had dropped nearly in half. By the end of the day I had nothing. I do not believe an adapter with a genuine chipset would die like this... after a bit of reading I found that knock offs of these are common.
Before looking for another card, have you tried the linux drivers available from here: http://www.realtek.com/downloads/downloadsView.aspx?Langid=1&PNid=48&PFid=48&Level=5&Conn=4&DownTypeID=3&GetDown=false&Downloads=true#RTL8191SE-VA2