Please HELP me CH340,341 NOT recognize my nvidia jetson AGX thor(kernal 6.8.12-terga)

Robotics & Edge Computing Jetson Systems Jetson Thor
1

Hello, I’m working on a robotics project (LeRobot SO-101) and need USB-to-Serial communication for controlling a bus servo board that uses the CH340/CH341 USB-to-UART chip.

On my Jetson AGX Thor (Ubuntu 24.04, kernel 6.8.12-tegra), the CH340/341 device is not recognized at all.

When I connect the board:

  1. No /dev/ttyUSB0 appears

  2. dmesg shows nothing related to ch34x

  3. lsusb does not list the CH340 device

  4. Same device works normally on my Windows laptop and Ubuntu PC

I believe the kernel driver for CH340/341 (ch341.ko) may not be included or enabled in the default Jetson Thor kernel.

My questions:

  1. Does Jetson AGX Thor’s default kernel include support for CH340/CH341 USB-to-Serial?

  2. If not, is there an official way to enable or rebuild the kernel with the ch34x driver?

  3. Do I need to manually compile the ch341 kernel module for kernel 6.8.12-tegra?

  4. Are there known limitations for USB-UART adapters on Thor’s current firmware?

System info:

Jetson AGX Thor Dev Kit

JetPack version: (write your version here)

Ubuntu 24.04 LTS

Kernel: 6.8.12-tegra

Device: Waveshare URT-1 bus servo controller (CH340C chip)

Thanks in advance!

2

Duplicated with Lerobot with CH340/CH341 USB-to-Serial not recognized on Jetson AGX Thor (Kernel 6.8.12-tegra)