USB--- kvm in ubuntu:

USB SS＝USB SuperSpeed＝USB 3.0!!顺应此前的USB 1.1 FullSpeed和USB 2.0 HighSpeed



    https://jingyan.baidu.com/article/b87fe19eb03cf1521835681c.html


    http://kingron.blog.163.com/blog/static/121373175201483084428320/