On Thu, 20 Feb 2020, Greg KH wrote: > On Wed, Feb 19, 2020 at 04:55:28PM -0500, James wrote: > > https://asrock.com/MB/AMD/B450M%20Pro4/index.us.asp#Specification > > - 2 x USB 2.0 Ports (Supports ESD Protection) > > - 1 x USB 3.1 Gen2 Type-A Port (10 Gb/s) (Supports ESD Protection) > > - 1 x USB 3.1 Gen2 Type-C Port (10 Gb/s) (Supports ESD Protection) > > - 4 x USB 3.1 Gen1 Ports (Supports ESD Protection) > > > > $ lsusb > > Bus 004 Device 002: ID 13fe:6300 Kingston Technology Company Inc. USB DISK > > 3.0 > > Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > > Bus 003 Device 004: ID 051d:0002 American Power Conversion Uninterruptible > > Power Supply > > Bus 003 Device 003: ID 04a9:190f Canon, Inc. CanoScan LiDE 220 > > Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > Bus 002 Device 002: ID 0bc2:2321 Seagate RSS LLC Expansion Portable > > Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub > > Bus 001 Device 006: ID 1bcf:0005 Sunplus Innovation Technology Inc. Optical > > Mouse > > Bus 001 Device 005: ID 04d9:1503 Holtek Semiconductor, Inc. Keyboard > > Bus 001 Device 004: ID 1a40:0101 Terminus Technology Inc. Hub > > Bus 001 Device 003: ID 046d:082c Logitech, Inc. HD Webcam C615 > > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > > > > $ lsusb -t > > /:� Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M > > ��� |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M > > /:� Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M > > ��� |__ Port 2: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 480M > > ��� |__ Port 4: Dev 4, If 0, Class=Human Interface Device, Driver=usbfs, > > 1.5M > > /:� Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M > > ��� |__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=uas, 5000M > > /:� Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/10p, 480M > > ��� |__ Port 5: Dev 3, If 0, Class=Audio, Driver=snd-usb-audio, 480M > > ��� |__ Port 5: Dev 3, If 1, Class=Audio, Driver=snd-usb-audio, 480M > > ��� |__ Port 5: Dev 3, If 2, Class=Video, Driver=uvcvideo, 480M > > ��� |__ Port 5: Dev 3, If 3, Class=Video, Driver=uvcvideo, 480M > > ��� |__ Port 6: Dev 4, If 0, Class=Hub, Driver=hub/4p, 480M > > ������� |__ Port 3: Dev 6, If 0, Class=Human Interface Device, > > Driver=usbhid, 1.5M > > ������� |__ Port 1: Dev 5, If 1, Class=Human Interface Device, > > Driver=usbhid, 1.5M > > ������� |__ Port 1: Dev 5, If 0, Class=Human Interface Device, > > Driver=usbhid, 1.5M > > > > > > 1. Does this mean the installer used the USB2 connections on the motherboard > > even though it looks like USB3.1 Gen ones were available? > > No, why do you say that? > > > 2. What is the number after the slash (4p) on xhci_hcd/4p? > > ports. > > > 3. Shouldn't "Linux Foundation 3.0 root hub" be "Linux Foundation 3.1 Gen 1 > > root hub"? > > No, we don't say that from within the kernel. But there's no reason we couldn't. Greg, you could allocate a new Product ID value for USB-3.1 root hubs and update lsusb to recognize it. (I don't know if it's worth including the "Gen 1" vs "Gen 2" part, though.) Alan Stern
