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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1635815/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs