Snowball: USB devices are not found on bootup randomly

[Fang Bao]

Description:
------------

When the snowball boot, the USB devices could not be found randomly. For example, the USB hub with USB keboard and USB mouse are found by Ubuntu. Though I tried to replug the USB device, the result is same.

The normal output by lsusb command is:

  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  Bus 001 Device 002: ID 1a40:0101 Terminus Technology Inc. 4-Port HUB
  Bus 001 Device 003: ID 046d:c315 Logitech, Inc. Classic New Touch Keyboard
  Bus 001 Device 004: ID 04b3:3107 IBM Corp. ThinkPad 800dpi Optical Travel Mouse

But when usb is not found, lsusb will only print:

  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

The system printed the log when replugging usb device.

  usb 1-1: device v1a40 p0101 is not supported.
  usb 1-1.1: device v046d pc315 is not supported
  usb1-1.1: device v04b3 p3107 is not supported

Reproducible:
------------
2/10

Hardware:
------------------
snowball V10

Software:
------------------
Image URL : http://releases.linaro.org/12.05/ubuntu/leb-snowball/
Used dd tool to flash sd image to sdcard and insert it in snowball.

[Fang Bao (fang-bao)]

I added the another dmesg log when system is normal booted.