Originally Posted by gerard
I use vmware with Backtrack and the Live version on CD. I have no problems with aircrack-ng. You must see what kind of chipset your Laptop Wlan is. For optimmal work with integrate WLAN Cards use this 3 chipsets: Atheros, Orinocco, Prism or Realtek.
Or, you buy a extern Wlan-Antenna over USB. On the offical website of Aircrack-ng stay a extern USB Wlan Device for best connection and work with Backtrack. The name of this device is ALFA Network.
Search on Ebay... I trust in this device
first of all find posts on the forum for sound problem as you can either upgrade alsa driver package only or upgrade the kernel.for second problem I am sure you are not connecting the Dongle after properly booting up backtrack.if still problem persists.try with this
ifconfig rausb0 down
modprobe -r rt73
iwconfig rausb0 rate 1M
try injection using aireplay-ng -9 rausb0