ubuntu@ubuntu-desktop:~$ journalctl -b |grep "usb 2"
Aug 26 20:27:11 ubuntu-desktop kernel: usb 2-1: new SuperSpeed USB device number 2 using tegra-xusb
Aug 26 20:27:11 ubuntu-desktop kernel: usb 2-1: New USB device found, idVendor=0451, idProduct=8025
Aug 26 20:27:11 ubuntu-desktop kernel: usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: new SuperSpeed USB device number 3 using tegra-xusb
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: New USB device found, idVendor=1005, idProduct=b168
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: Product: USB 3.0 DISK
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: Manufacturer:         
Aug 26 20:32:07 ubuntu-desktop kernel: usb 2-1.1: SerialNumber: 19001458934DFC04
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: Failed to set U1 timeout to 0x0,error code -71
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: Set SEL for device-initiated U1 failed.
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: Set SEL for device-initiated U2 failed.
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: usb_reset_and_verify_device Failed to disable LPM
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1-port1: cannot disable (err = -71)
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1: USB disconnect, device number 2
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: USB disconnect, device number 3
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1: new SuperSpeed USB device number 4 using tegra-xusb
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1: New USB device found, idVendor=0451, idProduct=8025
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: new SuperSpeed USB device number 5 using tegra-xusb
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: New USB device found, idVendor=1005, idProduct=b168
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: Product: USB 3.0 DISK
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: Manufacturer:         
Aug 26 21:57:38 ubuntu-desktop kernel: usb 2-1.1: SerialNumber: 19001458934DFC04
Aug 26 22:07:00 ubuntu-desktop kernel: usb 2-1.1: Failed to set U1 timeout to 0x0,error code -71
Aug 26 22:07:00 ubuntu-desktop kernel: usb 2-1.1: Set SEL for device-initiated U1 failed.
Aug 26 22:07:00 ubuntu-desktop kernel: usb 2-1.1: Set SEL for device-initiated U2 failed.
Aug 26 22:07:00 ubuntu-desktop kernel: usb 2-1.1: usb_reset_and_verify_device Failed to disable LPM
Aug 26 22:07:00 ubuntu-desktop kernel: usb 2-1-port1: cannot disable (err = -71)
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1: USB disconnect, device number 4
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: USB disconnect, device number 5
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1: new SuperSpeed USB device number 6 using tegra-xusb
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1: New USB device found, idVendor=0451, idProduct=8025
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: new SuperSpeed USB device number 7 using tegra-xusb
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: New USB device found, idVendor=1005, idProduct=b168
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: Product: USB 3.0 DISK
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: Manufacturer:         
Aug 26 22:07:01 ubuntu-desktop kernel: usb 2-1.1: SerialNumber: 19001458934DFC04