I have used with no problem the gamepad on other games: LFD2, big picture, truck simulator...., but it not detected by Portal.

• If I cat /dev/js0 and move the pad I see raw data moving
• going to the game console and execute run 360controller, or 360controller-linux does nothing.

How can I debug this? Why other steam source (LFD2) games work and this doesn't. What library are you using to handle the js?