USB 3.0 and 3.1 are recognized as 2.0

Question

I have desktop with ASUS PRIME X370-PRO motherboard and according tech-specs all of USB ports are 3.0 or 3.1, there are no 2.0 ports. Problem is that all exposed USB ports are recognized as 2.0. I am running Ubuntu 18.04.3 LTS.

Bus 003 should be 3.1 all others 3.0. I connect 3.0 device and bet only 2.0 speeds.

Any ideas how I can fix this?

# 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 002: ID 0bda:8812 Realtek Semiconductor Corp. RTL8812AU 802.11a/b/g/n/ac WLAN 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 002: ID 24ae:2010  
Bus 001 Device 003: ID 1b1c:0c04 Corsair 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

# lsusb -t
/:  Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 480M
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 10000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=88XXau, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/8p, 10000M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/14p, 480M
    |__ Port 3: Dev 2, If 2, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 3: Dev 2, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 14: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M

# lspci | grep -i usb
02:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] Device 43b9 (rev 02)
07:00.0 USB controller: ASMedia Technology Inc. ASM1143 USB 3.1 Host Controller
0b:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) USB 3.0 Host Controller

# uname -r
5.0.0-23-generic

Solution 1

Remove any rtl8812au drivers that you may have installed, and try this driver...

sudo apt install git dkms
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au
sudo ./dkms-install.sh

You should create a file in /etc/modprobe.d called 88XXau.conf that looks similar to this, to force USB 3.x operation. Without this file, the driver is supposed to come up and start in USB 2.x mode and switch up...

# Initially it will use USB2.0 mode, which will limit 5G 11ac throughput
# (USB2.0 bandwidth only 480Mbps => throughput around 240Mbps)
# with modprobe options it will switch to USB3.0 mode at initial driver load
#
options 88XXau rtw_switch_usb_mode=1
#
#
#
### TODO: run time change usb2.0/3.0 mode
#
### usb2.0 => usb3.0
#
# sudo sh -c "echo '1' > /sys/module/88XXau/parameters/rtw_switch_usb_mode"
#
### usb3.0 => usb2.0
#
# sudo sh -c "echo '2' > /sys/module/88XXau/parameters/rtw_switch_usb_mode"

Solution 2

All ports are properly detected. Linux kernel adds both 2.0 and 3.0 hubs to USB.

So you have three 2.0 and three 3.0 hubs.

It this case the problem is that the RTL8812AU device is detected as USB 2.0 device because of the driver limitation.

But real transfer speed of a wireless device is unlikely to be more than 480M. So it doesn't look like a real problem.

Comments

[aurimasplu]

worked like a charm :) /: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M |__ Port 2: Dev 6, If 0, Class=Vendor Specific Class, Driver=88XXau, 5000M