I am using Dell XPS 15 laptop......all my ports are usb 3.0 
port........it doesnot detect any usb device........i tried to add 
kernel parameters xhci.enable=1......but still the problem persist....<br>i hope that you will provide me a suitable solution for the above problem........my lsusb o/p is:<br><br><br>Bus 002 Device 003: ID 0421:0187 Nokia Mobile Phones <br>
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub<br>Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br>Bus 001 Device 004: ID 0408:2fb1 Quanta Computer, Inc. <br>Bus 001 Device 003: ID 0a5c:21b2 Broadcom Corp. <br>
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub<br>Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub<br><br>