Hi, I'm trying to use my Xbox360 Controller with the xpad driver. But
as soon as the led status is set (i.e. right after pluging it in) it
becomes completely unresponsive. If I comment out the led-setting code
in xpad.c the controller works but only until a rumble effect is
played, then it will become unresponsive again.

I have found that this does not occur if transfer_buffer_length is set
to the exact value, 3 for the led and 8 for rumble.