I have a USB2 hub attached to my computer. It was connected to a USB3 port. I moved it to a USB2 port and how all my USB devices work. None of them are connected to a USB3 port.
$ lsusb
Bus 006 Device 004: ID 0951:1666 Kingston Technology DataTraveler 100 G3/G4/SE9 G2/50
Bus 006 Device 003: ID 152d:0551 JMicron Technology Corp. / JMicron USA Technology Corp. JMS551 SuperSpeed two ports SATA 3Gb/s br
idge
Bus 006 Device 002: ID 2109:0810 VIA Labs, Inc. VL81x Hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 003: ID 04f2:0402 Chicony Electronics Co., Ltd Genius LuxeMate i200 Keyboard
Bus 005 Device 005: ID 192f:0916 Avago Technologies, Pte. ADNS-2710 Optical Mouse Controller
Bus 005 Device 004: ID 2109:3431 VIA Labs, Inc. Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 0b05:18f3 ASUSTek Computer, Inc. AURA LED Controller
Bus 003 Device 002: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 004: ID 0951:1666 Kingston Technology DataTraveler 100 G3/G4/SE9 G2/50
Bus 006 Device 003: ID 152d:0551 JMicron Technology Corp. / JMicron USA Technology Corp. JMS551 SuperSpeed two ports SATA 3Gb/s br
idge
Bus 006 Device 002: ID 2109:0810 VIA Labs, Inc. VL81x Hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 003: ID 04f2:0402 Chicony Electronics Co., Ltd Genius LuxeMate i200 Keyboard
Bus 005 Device 005: ID 192f:0916 Avago Technologies, Pte. ADNS-2710 Optical Mouse Controller
Bus 005 Device 004: ID 2109:3431 VIA Labs, Inc. Hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 0b05:18f3 ASUSTek Computer, Inc. AURA LED Controller
Bus 003 Device 002: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
$ lsusb -t
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
|__ Port 4: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
|__ Port 1: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 2: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M
|__ Port 5: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 5: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 6: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 6: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 5000M
|__ Port 1: Dev 3, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
|__ Port 4: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
|__ Port 1: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M
|__ Port 2: Dev 5, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
|__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M
|__ Port 5: Dev 2, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 5: Dev 2, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 6: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M
|__ Port 6: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 480M
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