Errm, it rather looks like it is waiting for a Virtual Terminal. That's a quite common patch for SDL, disabling interaction with a controlling terminal (because there might be none). There seem to be more involved, look at this:
http://stackoverflow.com/questions/3...minal-on-linux
Using "kill -9" (SIGKILL) should also get rid of the process, I think, without installing any other signal handlers within the application.