kernel.log的错误代码：
Apr 17 10:52:28 ubuntu kernel: [ 245.404056] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:28 ubuntu kernel: [ 245.616067] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:29 ubuntu kernel: [ 245.856055] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:29 ubuntu kernel: [ 246.069232] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:29 ubuntu kernel: [ 246.308057] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:29 ubuntu kernel: [ 246.520058] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:30 ubuntu kernel: [ 246.760051] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:30 ubuntu kernel: [ 246.972056] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:30 ubuntu kernel: [ 247.212062] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:30 ubuntu kernel: [ 247.424042] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:30 ubuntu kernel: [ 247.664037] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:31 ubuntu kernel: [ 247.876184] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:31 ubuntu kernel: [ 248.116037] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:31 ubuntu kernel: [ 248.328951] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:31 ubuntu kernel: [ 248.568060] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:32 ubuntu kernel: [ 248.780033] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:32 ubuntu kernel: [ 249.032044] hub 1-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:32 ubuntu kernel: [ 249.244053] hub 2-0:1.0: unable to enumerate USB device on port 10
Apr 17 10:52:32 ubuntu kernel: [ 249.484053] hub 1-0:1.0: unable to enumerate USB device on port 10
