[Q] Raw Packet Injection for Sgs2

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http://forum.xda-developers.com – I will make this short and sweet. I own a sgs2 rooted and I have CM9 running. I was able to get the correct kernel so I use monitor mode. I was very exicted until I realized that the sgs2 has little to no packet injection. What I mean by that is that when I go and do: aireplay-ng -0 2 -a (bssid) -c (client mac) I have to add this option: --ignore-negative-one or I get this error: Cannot determine current channel for wlan0 either apply a kernel patch or force it with --ignore-negative-one I have no idea what this option means. I have googled around and found nothing. I am aware of the raw (HowTos)