There are 6 usb ports in the motherboard,and 2 usb ports in the front panel.
I am using PS/2 serial port keyboard ,usb mouse.When mouse is plugged in the usb port:
Code:
lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 17ef:6019 Lenovo M-U0025-O Mouse
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 029: ID 1a40:0801 Terminus Technology Inc. USB 2.0 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
When to unplug the usb mouse and type "lsusb" again:
Code:
lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
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
Why two more hubs shown by "lsusb" when just one mouse plugged in one usb port?
Why no two usb hub listed by lsusb?
