I am have install Aircrack-ng from its official site. Compiling its source and installing.
And Gerix also from official site Source.
I am using AR9285 with ath9k drivers included default with Ubuntu 12.04
But on Performing injection test its says "mon is on channel -1" and i am unable to perform injection.
On the Aircrack-ng homepage you might have missed:
Channel -1 issues
If you are receiving an error message talking about channel -1, you either have to patch your driver like explained in the wiki or get the latest version of Aircrack-ng from our subversion repository and use the option --ignore-negative-one. You can find an installation guide also in the wiki.
If you've already compiled this from SVN, try adding the --ignore-negative-one argument to your injection command.
To have Gerix do that for you, you're going to need to open the script and look for where it calls aireplay (et al).
