, as low voltage can cause devices at higher port numbers (like Port 9) to fail. Run Hardware Troubleshooter : Use the built-in Windows Troubleshooter by going to
This can reveal the naming scheme.
When you see this in your Device Manager or system logs, it is mapping the connection path: port- 0009.hub- 0003
Linux represents USB devices in the /sys virtual filesystem. You can navigate to this directory to see the bus and device numbers. For example:
The Port_#0009.Hub_#0003 string is a real-time, hardware-derived identifier. It's not random; Windows generates it based on the physical connection. While it remains stable for a given port on a given hub, completely reconfiguring your USB hardware (e.g., changing motherboards or using different USB expansion cards) will result in a new identifier being generated. , as low voltage can cause devices at
These strings are most commonly seen in or system logs when a device is malfunctioning, often accompanied by an "Unknown USB Device" or "Code 43" error. This happens for several reasons:
The Windows Registry stores this information in a specific value called LocationInformation . To access it: You can navigate to this directory to see
. If you uninstall it, restart your PC to let Windows reinstall the driver automatically. Check Hub Power : Port 9 on Hub 3 often refers to an internal or external . If you are using an external hub, ensure it is properly powered
: This is the third logical USB controller or hub identified by your system's BIOS/OS. Port- 0009
Tools like the freeware USBDeview by NirSoft provide an easy-to-use graphical interface. This utility lists all USB devices ever connected to your system, making it effortless to see the current status and the Port_#XXXX.Hub_#YYYY location for any device.