I have a usb wifi adapter:
Bus 001 Device 003: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter
I start it in monitor mode like this:
airmon-ng start wlan1
And it says monitor mode was enabled [supposedly in wlan1]
So I do a test:
aireplay-ng -9 wlan1
But it says it found 0 APs. I tried compat-wireless, downloaded it and then compiled. And rmmoded the rt2800 modules, then tried to insert rt2800usb.ko, and it said something about unknown symbols, or something like that.