0438:7900 — Root Hub

This is the USB identifier for a Root Hub manufactured by Advanced Micro Devices, Inc.. The vendor ID 0438 is registered to Advanced Micro Devices, Inc. with the USB Implementers Forum, and 7900 is the product ID that Advanced Micro Devices, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 0438:7900 Advanced Micro Devices, Inc. Root Hub.

Linux

$ lsusb
Bus 001 Device 004: ID 0438:7900 Advanced Micro Devices, Inc. Root Hub

You can filter directly with lsusb -d 0438:7900, or get the full descriptor dump with lsusb -v -d 0438:7900. Kernel messages from dmesg show the same pair as idVendor=0438, idProduct=7900.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_0438&PID_7900
USB\VID_0438&PID_7900&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0438&PID_7900"

macOS

$ system_profiler SPUSBDataType
    Root Hub:
      Product ID: 0x7900
      Vendor ID: 0x0438  (Advanced Micro Devices, Inc.)

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.

The exact lines this page is generated from, in the upstream source file:

0438  Advanced Micro Devices, Inc.
	7900  Root Hub

See all 1 devices from Advanced Micro Devices, Inc. →