this is what the RaspberryPi fixed vers of NXEngine was compiled with that fixed some issues , however not sure oif directly this blocks X11windows or if its NXEngine itself. but the “Fixed” vers for pi refuses to run under an X11windows session.
Unfortunately, I do not have an XBox controller, so I do not have any experience with setting up xboxdrv. However, there is an an article about that in the wiki. Also, every input device that represents itself as a gamepad/joystick to the OS can be configured wo work with RetroArch and the other emulators that can be installed with the RetroPie Script. Also for that issue exists an article in the wiki.
Currently, NXEngine cannot be installed by the RetroPie Script. There are ports of NXEngine for the Raspberry, however, and if you know of a reliably and satisying working version, I would be glad if you point me into that direction 🙂 It would even be better, if you could come up with a pull request for the RetroPie Script at https://github.com/retropie/RetroPie-Setup ;-)
bah i dont see how to edit posts.. but maybe thinsg got fixed from NXEngine Source, but http://www.raspberrypi.org/phpBB3/viewtopic.php?f=78&t=25163 the version he posts was fixed for the Pi that stoped Stalls in audio, and visual fixes,
far as i know its only lookin for keyboard controlls. i know offhand the xboxdrv can work with generic gamepads as well and you can map any key to keybaord controlls i know how to for Xwindows bindings but that fixed version of NXEngine doesnt play nice with XWindows