Thanks for your advise, I seems resolved my problem by upgraded the kernel 
version to V4.9-RC2.
We are testing on 2 of system about 4 days,The issue is gone. Thanks all for 
help me!

** Changed in: linux (Ubuntu)
       Status: Incomplete => Confirmed

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https://bugs.launchpad.net/bugs/1635815

Title:
  USB port issue on Linux version 4.4.0-31-generic (buildd@lgw01-43)
  (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) )
  #50~14.04.1-Ubuntu SMP Wed Jul 13 01:07:32 UTC 2016 (Ubuntu
  4.4.0-31.50~14.04.1-generic 4.4.13)

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