un second
dmesg | grep USB
[ 2.026823] ACPI: bus type USB registered
[ 2.028155] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 2.028693] uhci_hcd: USB Universal Host Controller Interface driver
[ 2.108511] uhci_hcd 0000:00:01.2: new USB bus registered, assigned bus number 1
[ 2.108841] xhci_hcd 0000:01:1b.0: new USB bus registered, assigned bus number 2
[ 2.109182] usb usb1: New USB device found, idVendor=1d6b, idProduct=0001
[ 2.109183] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.109342] hub 1-0:1.0: USB hub found
[ 2.110738] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[ 2.110740] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.110861] hub 2-0:1.0: USB hub found
[ 2.111237] xhci_hcd 0000:01:1b.0: new USB bus registered, assigned bus number 3
[ 2.111352] usb usb3: New USB device found, idVendor=1d6b, idProduct=0003
[ 2.111353] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.111461] hub 3-0:1.0: USB hub found
[ 2.145745] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 4
[ 2.146099] usb usb4: New USB device found, idVendor=1d6b, idProduct=0001
[ 2.146101] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.146236] hub 4-0:1.0: USB hub found
[ 2.292605] ehci-pci 0000:00:1d.7: new USB bus registered, assigned bus number 5
[ 2.307100] ehci-pci 0000:00:1d.7: USB 2.0 started, EHCI 1.00
[ 2.307202] usb usb5: New USB device found, idVendor=1d6b, idProduct=0002
[ 2.307204] usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.307390] hub 5-0:1.0: USB hub found
[ 2.512632] hub 4-0:1.0: USB hub found
[ 2.547859] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned bus number 6
[ 2.548122] usb usb6: New USB device found, idVendor=1d6b, idProduct=0001
[ 2.548124] usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.548317] hub 6-0:1.0: USB hub found
[ 2.571101] usb 1-1: new full-speed USB device number 2 using uhci_hcd
[ 2.581080] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 7
[ 2.581350] usb usb7: New USB device found, idVendor=1d6b, idProduct=0001
[ 2.581352] usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 2.581543] hub 7-0:1.0: USB hub found
[ 2.635481] usb 2-1: new full-speed USB device number 2 using xhci_hcd
[ 2.758403] usb 1-1: New USB device found, idVendor=0627, idProduct=0001
[ 2.758405] usb 1-1: New USB device strings: Mfr=1, Product=3, SerialNumber=10
[ 2.758407] usb 1-1: Product: QEMU USB Tablet
[ 2.771865] usbhid: USB HID core driver
[ 2.773943] input: QEMU QEMU USB Tablet as /devices/pci0000:00/0000:00:01.2/usb1/1-1/1-1:1.0/0003:0627:0001.0001/input/input4
[ 2.774046] hid-generic 0003:0627:0001.0001: input,hidraw0: USB HID v0.01 Mouse [QEMU QEMU USB Tablet] on usb-0000:00:01.2-1/input0
[ 2.809105] usb 2-1: New USB device found, idVendor=10c4, idProduct=ea60
[ 2.809108] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.809110] usb 2-1: Product: CP2102 USB to UART Bridge Controller
[ 3.119344] usb 2-2: new full-speed USB device number 3 using xhci_hcd
[ 3.123474] usb 4-1: new low-speed USB device number 2 using uhci_hcd
[ 3.271838] usb 2-2: New USB device found, idVendor=0403, idProduct=6001
[ 3.271840] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.597776] usb 4-1: New USB device found, idVendor=051d, idProduct=0002
[ 3.597778] usb 4-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[ 3.597780] usb 4-1: Product: Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3
[ 3.671083] usb 2-3: new full-speed USB device number 4 using xhci_hcd
[ 3.818738] usb 2-3: New USB device found, idVendor=0403, idProduct=6001
[ 3.818740] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 3.943096] usb 2-4: new full-speed USB device number 5 using xhci_hcd
[ 4.084014] usb 2-4: New USB device found, idVendor=0409, idProduct=55aa
[ 4.084017] usb 2-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 4.084019] usb 2-4: Product: QEMU USB Hub
[ 4.084421] hub 2-4:1.0: USB hub found
[ 4.101112] hid-generic 0003:051D:0002.0002: hiddev0,hidraw1: USB HID v1.10 Device [American Power Conversion Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3 ] on usb-0000:00:1d.0-1/input0
[ 4.656925] usb 2-4.1: new full-speed USB device number 6 using xhci_hcd
[ 4.902405] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[ 4.902407] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 4.927382] usbserial: USB Serial support registered for generic
[ 4.973408] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 4.973475] ftdi_sio 2-3:1.0: FTDI USB Serial Device converter detected
[ 4.974079] usbserial: USB Serial support registered for cp210x
[ 4.974673] usb 2-3: FTDI USB Serial Device converter now attached to ttyUSB0
[ 4.976274] usb 2-1: cp210x converter now attached to ttyUSB1
[ 5.104776] cdc_acm 2-4.1:1.0: ttyACM0: USB ACM device
[ 5.105190] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 5338.363635] usb 2-3: USB disconnect, device number 4
[ 5338.363882] ftdi_sio ttyUSB0: error from flowcontrol urb
[ 5338.367544] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[ 5338.818850] usb 2-3: new full-speed USB device number 7 using xhci_hcd
[ 5338.970614] usb 2-3: New USB device found, idVendor=0403, idProduct=6001
[ 5338.970617] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 5338.970619] usb 2-3: Product: FT232R USB UART
[ 5343.364472] usb 2-4.1: USB disconnect, device number 6
[ 5350.742810] usb 2-4.1: new full-speed USB device number 8 using xhci_hcd
[ 5350.844453] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[ 5350.844456] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 5350.845196] cdc_acm 2-4.1:1.0: ttyACM1: USB ACM device
[22593.095194] usb 4-1: USB disconnect, device number 2
[22593.095782] usb 2-4.1: USB disconnect, device number 8
[22593.116196] usb 2-2: USB disconnect, device number 3
[22594.078634] usb 2-3: USB disconnect, device number 7
[22594.157643] usb 2-4.1: new full-speed USB device number 9 using xhci_hcd
[22594.259349] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[22594.259352] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[22594.260184] cdc_acm 2-4.1:1.0: ttyACM1: USB ACM device
[22594.309670] usb 4-1: new low-speed USB device number 3 using uhci_hcd
[22594.509510] usb 4-1: New USB device found, idVendor=051d, idProduct=0002
[22594.509513] usb 4-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[22594.509514] usb 4-1: Product: Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3
[22595.003923] hid-generic 0003:051D:0002.0003: hiddev0,hidraw1: USB HID v1.10 Device [American Power Conversion Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3 ] on usb-0000:00:1d.0-1/input0
[22727.710549] usb 2-1: USB disconnect, device number 2
[22727.715189] cp210x ttyUSB1: failed set request 0x7 status: -19
[22727.721568] cp210x ttyUSB1: failed set request 0x12 status: -19
[22727.722378] cp210x ttyUSB1: failed set request 0x0 status: -19
[22727.724981] cp210x ttyUSB1: cp210x converter now disconnected from ttyUSB1
[22736.573028] usb 2-2: new full-speed USB device number 10 using xhci_hcd
[22736.725183] usb 2-2: New USB device found, idVendor=0403, idProduct=6001
[22736.725185] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[22738.181003] usb 2-1: new full-speed USB device number 11 using xhci_hcd
[22738.353102] usb 2-1: New USB device found, idVendor=10c4, idProduct=ea60
[22738.353104] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[22738.353105] usb 2-1: Product: CP2102 USB to UART Bridge Controller
[22738.363432] usb 2-1: cp210x converter now attached to ttyUSB0
[22738.809019] usb 2-3: new full-speed USB device number 12 using xhci_hcd
[22738.960881] usb 2-3: New USB device found, idVendor=0403, idProduct=6001
[22738.960883] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[22940.078994] usb 2-4.1: USB disconnect, device number 9
[22940.082726] usb 2-1: USB disconnect, device number 11
[22940.083180] cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
[22940.086161] usb 4-1: USB disconnect, device number 3
[22941.043977] usb 2-2: USB disconnect, device number 10
[22941.124113] usb 2-4.1: new full-speed USB device number 13 using xhci_hcd
[22941.416097] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[22941.416099] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[22941.416861] cdc_acm 2-4.1:1.0: ttyACM1: USB ACM device
[22941.472110] usb 4-1: new low-speed USB device number 4 using uhci_hcd
[22941.616127] usb 2-2: new full-speed USB device number 14 using xhci_hcd
[22941.669369] usb 4-1: New USB device found, idVendor=051d, idProduct=0002
[22941.669372] usb 4-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[22941.669373] usb 4-1: Product: Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3
[22942.165442] hid-generic 0003:051D:0002.0004: hiddev0,hidraw1: USB HID v1.10 Device [American Power Conversion Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3 ] on usb-0000:00:1d.0-1/input0
[22947.108092] usb 2-2: new full-speed USB device number 15 using xhci_hcd
[22947.262246] usb 2-2: New USB device found, idVendor=0403, idProduct=6001
[22947.262248] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[22947.263131] usb 2-3: USB disconnect, device number 12
[22947.708081] usb 2-3: new full-speed USB device number 16 using xhci_hcd
[22947.865807] usb 2-3: New USB device found, idVendor=0403, idProduct=6001
[22947.865809] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[23065.870920] usb 2-4.1: USB disconnect, device number 13
[23065.875488] usb 2-2: USB disconnect, device number 15
[23065.879407] usb 4-1: USB disconnect, device number 4
[23066.835371] usb 2-3: USB disconnect, device number 16
[23066.915526] usb 2-4.1: new full-speed USB device number 17 using xhci_hcd
[23067.017342] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[23067.017345] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[23067.018050] cdc_acm 2-4.1:1.0: ttyACM1: USB ACM device
[23067.103526] usb 4-1: new low-speed USB device number 5 using uhci_hcd
[23067.303201] usb 4-1: New USB device found, idVendor=051d, idProduct=0002
[23067.303204] usb 4-1: New USB device strings: Mfr=3, Product=1, SerialNumber=2
[23067.303206] usb 4-1: Product: Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3
[23067.788611] hid-generic 0003:051D:0002.0005: hiddev0,hidraw1: USB HID v1.10 Device [American Power Conversion Back-UPS XS 700U FW:924.Z3 .I USB FW:Z3 ] on usb-0000:00:1d.0-1/input0
[23076.495488] usb 2-2: new full-speed USB device number 18 using xhci_hcd
[23076.647353] usb 2-2: New USB device found, idVendor=0403, idProduct=6001
[23076.647355] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[23078.511475] usb 2-3: new full-speed USB device number 19 using xhci_hcd
[23078.661135] usb 2-3: New USB device found, idVendor=0403, idProduct=6001
[23078.661138] usb 2-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[23078.661139] usb 2-3: Product: FT232R USB UART
[23078.665351] ftdi_sio 2-3:1.0: FTDI USB Serial Device converter detected
[23078.666137] usb 2-3: FTDI USB Serial Device converter now attached to ttyUSB0
[23160.335132] usb 2-1: new full-speed USB device number 20 using xhci_hcd
[23160.507390] usb 2-1: New USB device found, idVendor=10c4, idProduct=ea60
[23160.507393] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[23160.507395] usb 2-1: Product: CP2102 USB to UART Bridge Controller
[23160.517824] usb 2-1: cp210x converter now attached to ttyUSB1
[23235.884097] usb 2-4.1: USB disconnect, device number 17
[23240.498770] usb 2-4.1: new full-speed USB device number 21 using xhci_hcd
[23240.600359] usb 2-4.1: New USB device found, idVendor=0658, idProduct=0200
[23240.600362] usb 2-4.1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[23240.601082] cdc_acm 2-4.1:1.0: ttyACM1: USB ACM device