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initial version

----- output of lsusb:

Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root 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 148f:7601 Ralink Technology, Corp. MT7601U Wireless 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 003: ID 046d:c077 Logitech, Inc. M105 Optical Mouse Bus 001 Device 002: ID 413c:2113 Dell Computer Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

----- output of lsusb -t

/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M /: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M /: 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/4p, 480M |__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=option, 480M /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/3p, 10000M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/9p, 480M |__ Port 6: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 6: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 9: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M

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No.2 Revision

----- output of lsusb:

Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root 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 148f:7601 Ralink Technology, Corp. MT7601U Wireless 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 003: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 002: ID 413c:2113 Dell Computer Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

hub

----- output of lsusb -t

/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 10000M
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
/:  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/4p, 480M
    |__ Port 3: Dev 3, If 0, Class=Vendor Specific Class, Driver=option, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/3p, 10000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/9p, 480M
    |__ Port 6: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
    |__ Port 6: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M
    |__ Port 9: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M

1.5M