Try for the repeat is just kind of error on discussion for the o of airodump and here is the solution I used for Backtrack 4 r1 and Backtrack r2 and is working for Backtrack 5.
Open New Console
Code:
cd /usr/src/drivers
wget http://wireless.kernel.org/download/...-04-20.tar.bz2
tar jxvf compat-wireless-2010-04-20.tar.bz2
cd compat-wireless-2010-04-20
wget http://patches.aircrack-ng.org/mac80...radiotap.patch
cat mac80211_2.6.32.2-wl_frag+ack_radiotap.patch | patch -p1
make
make install
make unload
modprobe rt2800usb
When you done with all above commands restart your system. Try to test interfaces
Code:
Airmon-ng start wlan0
Interface Chipset Driver
wlan0 RaLink RT2870/3070 rt2800usb - [phy0]
(monitor mode enabled on mon0)
Verify if your wireless card is detected by airodrodump.
Now test your wireless card let’s see if injection mode is working in your wireless card
Code:
aireplay-ng -9 mon0
airdump-ng -9 mon0
15:42:20 Trying broadcast probe requests...
15:42:21 Injection is working!
15:45:22 Found 1 Access point
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