device can not be detected in USB2 when using Jetpack3.1 in TX1

I connect usb2 which is B42 and B43 with LTE module i need, then I try to read info from it, but I find USB can not be found( I use lsusb but not show LTE module) when using Jetpack3.1 in TX1.
Then I use old version Jetpack 2.3.1 and I repeat operation above, then in lsusb i can find such LTE device, so I am confuesd that if the usb2 can not used or config disable in Jetpack3.1.
If anyone can help me, thanks!

Hi Chad Ding,
On r28.1, you need the patch to configure B42 B43 for USB