Running upstream 5.5-rc2 mainline build:

$ dmesg | grep -e usb -e xhci -e hub
[   13.482690] usbcore: registered new interface driver usbfs
[   13.486685] usbcore: registered new interface driver hub
[   13.490894] usbcore: registered new device driver usb
[   20.767117] xhci_hcd 0000:00:14.0: xHCI Host Controller
[   20.785496] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1
[   20.798259] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100 quirks 0x0000000000009810
[   20.811788] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported
[   20.823094] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.05
[   20.836334] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[   20.848887] usb usb1: Product: xHCI Host Controller
[   20.858017] usb usb1: Manufacturer: Linux 5.5.0-050500rc2-generic xhci-hcd
[   20.869159] usb usb1: SerialNumber: 0000:00:14.0
[   20.878106] hub 1-0:1.0: USB hub found
[   20.886024] hub 1-0:1.0: 16 ports detected
[   20.896244] xhci_hcd 0000:00:14.0: xHCI Host Controller
[   20.905530] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2
[   20.916945] xhci_hcd 0000:00:14.0: Host supports USB 3.0 SuperSpeed
[   20.927188] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.05
[   20.939474] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[   20.950664] usb usb2: Product: xHCI Host Controller
[   20.959488] usb usb2: Manufacturer: Linux 5.5.0-050500rc2-generic xhci-hcd
[   20.970333] usb usb2: SerialNumber: 0000:00:14.0
[   20.979098] hub 2-0:1.0: USB hub found
[   20.986792] hub 2-0:1.0: 10 ports detected
[   20.995285] usb: port power management may be unreliable
[   21.234739] usb 1-2: new high-speed USB device number 2 using xhci_hcd
[   21.420393] usb 1-2: New USB device found, idVendor=0424, idProduct=2807, bcdDevice= 2.04
[   21.438440] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   21.456273] usb 1-2: Product: USB2807 Hub
[   21.475407] usb 1-2: Manufacturer: Microchip
[   21.483366] hub 1-2:1.0: USB hub found
[   21.497439] hub 1-2:1.0: 7 ports detected
[   21.643079] usb 1-3: new high-speed USB device number 3 using xhci_hcd
[   21.804368] usb 1-3: New USB device found, idVendor=04b4, idProduct=6570, bcdDevice=32.99
[   21.818352] usb 1-3: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[   21.828698] usb 1-3: Product: USB2.0 Hub
[   21.845471] hub 1-3:1.0: USB hub found
[   21.862212] hub 1-3:1.0: 4 ports detected
[   21.882739] usb 1-2.1: new high-speed USB device number 4 using xhci_hcd
[   21.991442] usb 1-2.1: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[   22.002897] usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   22.013317] usb 1-2.1: Product: Quad RS232-HS
[   22.020854] usb 1-2.1: Manufacturer: FTDI
[   22.122687] usb 1-4: new high-speed USB device number 5 using xhci_hcd
[   22.288257] usb 1-4: New USB device found, idVendor=04b4, idProduct=6570, bcdDevice=32.99
[   22.302833] usb 1-4: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[   22.302835] usb 1-4: Product: USB2.0 Hub
[   22.364574] hub 1-4:1.0: USB hub found
[   22.370903] usb 1-2.2: new high-speed USB device number 6 using xhci_hcd
[   22.380040] hub 1-4:1.0: 4 ports detected
[   22.495795] usb 1-2.2: New USB device found, idVendor=0424, idProduct=2807, bcdDevice= 2.04
[   22.508652] usb 1-2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   22.508654] usb 1-2.2: Product: USB2807 Hub
[   22.524198] usb 1-2.2: Manufacturer: Microchip
[   22.581220] hub 1-2.2:1.0: USB hub found
[   22.597403] hub 1-2.2:1.0: 7 ports detected
[   22.622689] usb 1-13: new high-speed USB device number 7 using xhci_hcd
[   22.826147] usb 1-13: New USB device found, idVendor=046b, idProduct=ff01, bcdDevice= 1.00
[   22.847761] usb 1-13: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   22.858510] usb 1-13: Product: Virtual Hub
[   22.866086] usb 1-13: Manufacturer: American Megatrends Inc.
[   22.875209] usb 1-13: SerialNumber: serial
[   22.884076] hub 1-13:1.0: USB hub found
[   22.891503] hub 1-13:1.0: 5 ports detected
[   22.902737] usb 1-2.3: new full-speed USB device number 8 using xhci_hcd
[   23.016265] usb 1-2.3: New USB device found, idVendor=1b4f, idProduct=9204, bcdDevice= 1.00
[   23.028253] usb 1-2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   23.028255] usb 1-2.3: Product: SparkFun Pro Micro
[   23.047498] usb 1-2.3: Manufacturer: SparkFun
[   23.090748] usb 1-2.2.4: new high-speed USB device number 9 using xhci_hcd
[   23.207386] usb 1-2.2.4: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[   23.220876] usb 1-2.2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   23.220877] usb 1-2.2.4: Product: Quad RS232-HS
[   23.220877] usb 1-2.2.4: Manufacturer: FTDI
[   23.286761] usb 1-2.4: new full-speed USB device number 10 using xhci_hcd
[   23.432425] usb 1-2.4: New USB device found, idVendor=1b4f, idProduct=9204, bcdDevice= 1.00
[   23.453288] usb 1-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   23.465024] usb 1-2.4: Product: SparkFun Pro Micro
[   23.465025] usb 1-2.4: Manufacturer: SparkFun
[   23.534757] usb 1-13.1: new high-speed USB device number 11 using xhci_hcd
[   23.676701] usb 1-13.1: New USB device found, idVendor=046b, idProduct=ff20, bcdDevice= 1.00
[   23.689561] usb 1-13.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   23.701343] usb 1-13.1: Product: Virtual Cdrom Device
[   23.710793] usb 1-13.1: Manufacturer: American Megatrends Inc.
[   23.720904] usb 1-13.1: SerialNumber: AAAABBBBCCCC1
[   23.734020] usb-storage 1-13.1:1.0: USB Mass Storage device detected
[   23.744829] scsi host6: usb-storage 1-13.1:1.0
[   23.754738] usb 1-2.2.5: new high-speed USB device number 12 using xhci_hcd
[   23.763047] usbcore: registered new interface driver usb-storage
[   23.794741] usbcore: registered new interface driver uas
[   23.871457] usb 1-2.2.5: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[   23.884000] usb 1-2.2.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   23.895466] usb 1-2.2.5: Product: Quad RS232-HS
[   23.903875] usb 1-2.2.5: Manufacturer: FTDI
[   23.950758] usb 1-2.5: new high-speed USB device number 13 using xhci_hcd
[   24.058930] usb 1-2.5: New USB device found, idVendor=0424, idProduct=2514, bcdDevice= b.b3
[   24.071224] usb 1-2.5: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   24.083534] hub 1-2.5:1.0: USB hub found
[   24.091346] hub 1-2.5:1.0: 4 ports detected
[   24.166755] usb 1-13.2: new high-speed USB device number 14 using xhci_hcd
[   24.305784] usb 1-13.2: New USB device found, idVendor=046b, idProduct=ffb0, bcdDevice= 1.00
[   24.318091] usb 1-13.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   24.329328] usb 1-13.2: Product: Virtual Ethernet
[   24.337767] usb 1-13.2: Manufacturer: American Megatrends Inc.
[   24.347411] usb 1-13.2: SerialNumber: 1234567890
[   24.390769] usb 1-2.2.6: new high-speed USB device number 15 using xhci_hcd
[   24.499533] usb 1-2.2.6: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[   24.511869] usb 1-2.2.6: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   24.523117] usb 1-2.2.6: Product: Quad RS232-HS
[   24.531358] usb 1-2.2.6: Manufacturer: FTDI
[   24.578781] usb 1-2.6: new high-speed USB device number 16 using xhci_hcd
[   24.686939] usb 1-2.6: New USB device found, idVendor=0424, idProduct=2514, bcdDevice= b.b3
[   24.699145] usb 1-2.6: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[   24.711744] hub 1-2.6:1.0: USB hub found
[   24.719612] hub 1-2.6:1.0: 4 ports detected
[   24.766780] usb 1-2.5.1: new full-speed USB device number 17 using xhci_hcd
[   24.883256] usb 1-2.5.1: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   24.895847] usb 1-2.5.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   24.907426] usb 1-2.5.1: Product: FT200X USB I2C c1
[   24.916399] usb 1-2.5.1: Manufacturer: FTDI
[   24.924598] usb 1-2.5.1: SerialNumber: DM01P784
[   24.982764] usb 1-13.5: new low-speed USB device number 18 using xhci_hcd
[   25.123964] usb 1-13.5: New USB device found, idVendor=046b, idProduct=ff10, bcdDevice= 1.00
[   25.136484] usb 1-13.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   25.147924] usb 1-13.5: Product: Virtual Keyboard and Mouse
[   25.157539] usb 1-13.5: Manufacturer: American Megatrends Inc.
[   25.192592] usbcore: registered new interface driver usbhid
[   25.198758] usb 1-2.2.7: new high-speed USB device number 19 using xhci_hcd
[   25.202236] usbhid: USB HID core driver
[   25.222644] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13.5/1-13.5:1.0/0003:046B:FF10.0001/input/input1
[   25.246127] hid-generic 0003:046B:FF10.0001: input,hidraw0: USB HID v1.10 Keyboard [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:14.0-13.5/input0
[   25.270138] input: American Megatrends Inc. Virtual Keyboard and Mouse as /devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13.5/1-13.5:1.1/0003:046B:FF10.0002/input/input2
[   25.294364] hid-generic 0003:046B:FF10.0002: input,hidraw1: USB HID v1.10 Mouse [American Megatrends Inc. Virtual Keyboard and Mouse] on usb-0000:00:14.0-13.5/input1
[   25.311442] usb 1-2.2.7: New USB device found, idVendor=0403, idProduct=6011, bcdDevice= 8.00
[   25.332018] usb 1-2.2.7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[   25.344324] usb 1-2.2.7: Product: Quad RS232-HS
[   25.353668] usb 1-2.2.7: Manufacturer: FTDI
[   25.390772] usb 1-2.6.1: new full-speed USB device number 20 using xhci_hcd
[   25.511602] usb 1-2.6.1: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   25.524922] usb 1-2.6.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   25.537171] usb 1-2.6.1: Product: FT200X USB I2C g1
[   25.546812] usb 1-2.6.1: Manufacturer: FTDI
[   25.555722] usb 1-2.6.1: SerialNumber: DM01P7DY
[   25.582775] usb 1-2.5.2: new full-speed USB device number 21 using xhci_hcd
[   25.606820] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   25.699584] usb 1-2.5.2: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   25.712710] usb 1-2.5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   25.712713] usb 1-2.5.2: Product: FT200X USB I2C c0
[   25.749443] usb 1-2.5.2: Manufacturer: FTDI
[   25.758322] usb 1-2.5.2: SerialNumber: DM01P776
[   25.770770] usb 1-2.6.2: new full-speed USB device number 22 using xhci_hcd
[   25.891508] usb 1-2.6.2: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   25.905734] usb 1-2.6.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   25.918348] usb 1-2.6.2: Product: FT200X USB I2C g0
[   25.927910] usb 1-2.6.2: Manufacturer: FTDI
[   25.936733] usb 1-2.6.2: SerialNumber: DM01P7CZ
[   25.962782] usb 1-2.5.3: new full-speed USB device number 23 using xhci_hcd
[   26.091504] usb 1-2.5.3: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   26.104804] usb 1-2.5.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   26.116995] usb 1-2.5.3: Product: FT200X USB I2C a1
[   26.126541] usb 1-2.5.3: Manufacturer: FTDI
[   26.135283] usb 1-2.5.3: SerialNumber: DM01P76Q
[   26.162770] usb 1-2.6.3: new full-speed USB device number 24 using xhci_hcd
[   26.283503] usb 1-2.6.3: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   26.296738] usb 1-2.6.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   26.308939] usb 1-2.6.3: Product: FT200X USB I2C e1
[   26.318451] usb 1-2.6.3: Manufacturer: FTDI
[   26.327208] usb 1-2.6.3: SerialNumber: DM01P7CJ
[   26.354775] usb 1-2.5.4: new full-speed USB device number 25 using xhci_hcd
[   26.471508] usb 1-2.5.4: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   26.484290] usb 1-2.5.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   26.495947] usb 1-2.5.4: Product: FT200X USB I2C a0
[   26.504867] usb 1-2.5.4: Manufacturer: FTDI
[   26.512933] usb 1-2.5.4: SerialNumber: DM01P77P
[   26.542762] usb 1-2.6.4: new full-speed USB device number 26 using xhci_hcd
[   26.659605] usb 1-2.6.4: New USB device found, idVendor=0403, idProduct=6015, bcdDevice=10.00
[   26.671916] usb 1-2.6.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[   26.683208] usb 1-2.6.4: Product: FT200X USB I2C e0
[   26.691888] usb 1-2.6.4: Manufacturer: FTDI
[   26.699790] usb 1-2.6.4: SerialNumber: DM01P7DH
[   29.686823] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   33.766813] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   37.846814] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   41.926819] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   46.006814] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   49.613354] usbcore: registered new interface driver usbserial_generic
[   49.613542] usbserial: USB Serial support registered for generic
[   49.616929] usbcore: registered new interface driver ftdi_sio
[   49.617121] usbserial: USB Serial support registered for FTDI USB Serial Device
[   49.617761] usb 1-2.1: Detected FT4232H
[   49.618381] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB0
[   49.618803] usbcore: registered new interface driver cdc_acm
[   49.618869] usb 1-2.1: Detected FT4232H
[   49.619710] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB1
[   49.620639] usb 1-2.1: Detected FT4232H
[   49.621352] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB2
[   49.622035] usb 1-2.1: Detected FT4232H
[   49.622669] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB3
[   49.623246] usb 1-2.2.4: Detected FT4232H
[   49.623861] usb 1-2.2.4: FTDI USB Serial Device converter now attached to ttyUSB4
[   49.624432] usb 1-2.2.4: Detected FT4232H
[   49.625013] usb 1-2.2.4: FTDI USB Serial Device converter now attached to ttyUSB5
[   49.625405] usb 1-2.2.4: Detected FT4232H
[   49.625958] usb 1-2.2.4: FTDI USB Serial Device converter now attached to ttyUSB6
[   49.626609] usb 1-2.2.4: Detected FT4232H
[   49.627369] usb 1-2.2.4: FTDI USB Serial Device converter now attached to ttyUSB7
[   49.628127] usb 1-2.2.5: Detected FT4232H
[   49.628807] usb 1-2.2.5: FTDI USB Serial Device converter now attached to ttyUSB8
[   49.629409] usb 1-2.2.5: Detected FT4232H
[   49.630186] usb 1-2.2.5: FTDI USB Serial Device converter now attached to ttyUSB9
[   49.630638] usb 1-2.2.5: Detected FT4232H
[   49.631425] usb 1-2.2.5: FTDI USB Serial Device converter now attached to ttyUSB10
[   49.632099] usb 1-2.2.5: Detected FT4232H
[   49.633301] usb 1-2.2.5: FTDI USB Serial Device converter now attached to ttyUSB11
[   49.634189] usb 1-2.2.6: Detected FT4232H
[   49.635080] usb 1-2.2.6: FTDI USB Serial Device converter now attached to ttyUSB12
[   49.635964] usb 1-2.2.6: Detected FT4232H
[   49.636977] usb 1-2.2.6: FTDI USB Serial Device converter now attached to ttyUSB13
[   49.637993] usb 1-2.2.6: Detected FT4232H
[   49.638893] usb 1-2.2.6: FTDI USB Serial Device converter now attached to ttyUSB14
[   49.639641] usb 1-2.2.6: Detected FT4232H
[   49.640412] usb 1-2.2.6: FTDI USB Serial Device converter now attached to ttyUSB15
[   49.640972] usb 1-2.5.1: Detected FT-X
[   49.643054] usb 1-2.5.1: FTDI USB Serial Device converter now attached to ttyUSB16
[   49.643333] usb 1-2.2.7: Detected FT4232H
[   49.643728] usb 1-2.2.7: FTDI USB Serial Device converter now attached to ttyUSB17
[   49.643996] usb 1-2.2.7: Detected FT4232H
[   49.644315] usb 1-2.2.7: FTDI USB Serial Device converter now attached to ttyUSB18
[   49.644486] usb 1-2.2.7: Detected FT4232H
[   49.644775] usb 1-2.2.7: FTDI USB Serial Device converter now attached to ttyUSB19
[   49.645055] usb 1-2.2.7: Detected FT4232H
[   49.645449] usb 1-2.2.7: FTDI USB Serial Device converter now attached to ttyUSB20
[   49.645775] usb 1-2.6.1: Detected FT-X
[   49.647376] usb 1-2.6.1: FTDI USB Serial Device converter now attached to ttyUSB21
[   49.647736] usb 1-2.5.2: Detected FT-X
[   49.650081] usb 1-2.5.2: FTDI USB Serial Device converter now attached to ttyUSB22
[   49.650645] usb 1-2.6.2: Detected FT-X
[   49.652869] usb 1-2.6.2: FTDI USB Serial Device converter now attached to ttyUSB23
[   49.653339] usb 1-2.5.3: Detected FT-X
[   49.654864] usb 1-2.5.3: FTDI USB Serial Device converter now attached to ttyUSB24
[   49.655471] usb 1-2.6.3: Detected FT-X
[   49.657915] usb 1-2.6.3: FTDI USB Serial Device converter now attached to ttyUSB25
[   49.658920] usb 1-2.5.4: Detected FT-X
[   49.662149] usb 1-2.5.4: FTDI USB Serial Device converter now attached to ttyUSB26
[   49.663206] usb 1-2.6.4: Detected FT-X
[   49.667083] usb 1-2.6.4: FTDI USB Serial Device converter now attached to ttyUSB27
[   49.730374] cdc_ether 1-13.2:2.0 usb0: register 'cdc_ether' at usb-0000:00:14.0-13.2, CDC Ethernet Device, d2:55:2e:ed:44:49
[   49.731312] usbcore: registered new interface driver cdc_ether
[   50.098718] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   54.182764] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   58.266814] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   62.342799] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   66.418800] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   70.494801] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   74.570805] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   78.646798] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   82.722799] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   86.798811] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   90.878804] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   94.954772] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[   99.030813] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[  103.106806] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[  107.182821] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[  111.258821] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?
[  115.334820] usb usb2-port2: Cannot enable. Maybe the USB cable is bad?