FTDI USB device detected but ftdi_sio driver not loaded

[Broussailles]

Windows Version

Microsoft Windows [version 10.0.22621.1848]

WSL Version

2.1.5.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

5.15.146.1-microsoft-standard-WSL2

Distro Version

Debian GNU/Linux 12 (bookworm)

Other Software

usbipd-win 4.1.0+52.Branch.master.Sha.b0b7589d2dc4481b1af481787d6d773f46d0758

Repro Steps

FTDI USB Serial Device (TTL-232RG) connected , Shared and Attached

Expected Behavior

New USB device detected by Linux Kernel,
FTD driver loaded
/dev/ttyUSB0 node device created

Following lines expected in kernel messages:
(Older version of WSL)

Mar 4 14:33:36 GOR-LAP-27 kernel: vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3)
Mar 4 14:33:36 GOR-LAP-27 kernel: vhci_hcd vhci_hcd.0: devid(458754) speed(2) speed_str(full-speed)
Mar 4 14:33:36 GOR-LAP-27 kernel: vhci_hcd vhci_hcd.0: Device attached
Mar 4 14:33:37 GOR-LAP-27 kernel: vhci_hcd: vhci_device speed not set
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: new full-speed USB device number 4 using vhci_hcd
Mar 4 14:33:37 GOR-LAP-27 kernel: vhci_hcd: vhci_device speed not set
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: SetAddress Request (4) to port 0
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: Product: TTL232RG-VREG3V3
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: Manufacturer: FTDI
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: SerialNumber: FT4M5QPB
Mar 4 14:33:37 GOR-LAP-27 kernel: ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: Detected FT232RL
Mar 4 14:33:37 GOR-LAP-27 kernel: usb 1-1: FTDI USB Serial Device converter now attached to ttyUSB0

Actual Behavior

Current lines observed in kernel messages
[ 517.212711] vhci_hcd vhci_hcd.0: pdev(0) rhport(0) sockfd(3)
[ 517.214455] vhci_hcd vhci_hcd.0: devid(458753) speed(2) speed_str(full-speed)
[ 517.215864] vhci_hcd vhci_hcd.0: Device attached
[ 517.496755] vhci_hcd: vhci_device speed not set
[ 517.566815] usb 1-1: new full-speed USB device number 2 using vhci_hcd
[ 517.647031] vhci_hcd: vhci_device speed not set
[ 517.716812] usb 1-1: SetAddress Request (2) to port 0
[ 517.760078] usb 1-1: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
[ 517.761869] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 517.762593] usb 1-1: Product: TTL232RG-VREG3V3
[ 517.763071] usb 1-1: Manufacturer: FTDI
[ 517.763387] usb 1-1: SerialNumber: FT4M5QPB
@paudenard@GOR-LAP-27:/var/log$

Diagnostic Logs

lsusb output:

According to /proc/config.gz , Kernel has been built with FTDI_SIO Options

Kernel Object present in /usr/lib/modules

[github-actions]

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• udev rule to allow non-root access to libusb devices being ignored/not working (#8502), similarity score: 0.75
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[andywong36]

I am running into the same issue with the same hardware.

The only difference is the distro - Ubuntu 22.04.4 LTS.

@Broussailles Do you have the linux kernel version you were using on March 4th?

Edit: just enable the FTDI kernel module

sudo modprobe ftdi_sio

[ralflang]

For some reason my 5.15 kernel had ftdi_sio as a module rather than a builtin.
And it seems that is the official build config for 5.15 https://github.com/microsoft/WSL2-Linux-Kernel/blob/linux-msft-wsl-5.15.y/arch/x86/configs/config-wsl#L2769C1-L2770C1

CONFIG_USB_SERIAL_FTDI_SIO=m

But 6.1 fixes that already
https://github.com/microsoft/WSL2-Linux-Kernel/blob/linux-msft-wsl-6.1.y/arch/x86/configs/config-wsl#L2858C1-L2858C27

CONFIG_USB_SERIAL_FTDI_SIO=y

Detailed walk through of my steps, including a probably unnecessary --set-val on the FTDI driver documented here:

https://www.ralf-lang.de/2024/04/02/run-ftdi-usb-devices-on-windows-10-11-wsl2/

git clone https://github.com/microsoft/WSL2-Linux-Kernel.git --depth=1 -b linux-msft-wsl-6.1.y
sudo apt update
sudo apt -y install build-essential flex bison libssl-dev libelf-dev bc 
sudo apt -y install python3 pahole
cd WSL2-Linux-Kernel
## This line turns the FTDI driver from disabled or module to builtin
./scripts/config --file Microsoft/config-wsl --set-val CONFIG_USB_SERIAL_FTDI_SIO y
make -j$(nproc) KCONFIG_CONFIG=Microsoft/config-wsl
sudo make modules_install headers_install
## Use another target directory if you don't want the kernel in the root of C:\
cp arch/x86/boot/bzImage /mnt/c/bzImage-6.1
```