Mouse cursor freaks out when Xbox 360 controller connected

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http://askubuntu.com – I think I screwed something up in a HID library when trying to install a PS3 controller not long ago, as the PS3 controller never worked right, and now when I try to connect an Xbox 360 controller, the mouse cursor jumps to the top-left corner of the screen and neither it nor the keyboard will respond. any idea what I ought to purge to fix this? thanks! (HowTos)