Jetson Orin Nano: USB Timeout Issues During Flashing

Issue Overview

Users are encountering issues while attempting to flash the Jetson Orin Nano Developer Kit, specifically related to USB timeout errors during the flashing process. The device fails to boot properly after flashing, often hanging at various stages of the process. Users have reported difficulties with USB detection and connectivity, especially when using virtual machines (VMs) for the flashing process. This issue affects their ability to set up and utilize the Jetson Orin Nano effectively.

Relevant Hardware and Software Specifications

• Device: Jetson Orin Nano Developer Kit (8GB)
• Host Operating System: Ubuntu 20.04
• Flashing Method: Using l4t_initrd_flash.sh script and SDK Manager.
• USB Connection: Various USB 3.1 and USB-C cables have been tested.

Symptoms

• Repeated messages during the flashing process indicating a USB timeout:
  • ERROR: might be timeout in USB write.
• The system fails to boot properly after flashing, leading to a non-responsive state.
• Inability to establish SSH connections after multiple flashing attempts.

Possible Causes

1. Incompatible Flashing Method: Flashing from a VM instead of a native Linux installation may introduce complications that affect the process.
2. USB Cable or Port Issues: Faulty or incompatible USB cables or ports could lead to communication failures during the flash process.
3. Driver or Kernel Issues: There may be bugs or conflicts in the drivers or kernel version being used that affect USB communication.
4. Power Supply Problems: Insufficient power supply could lead to unstable operation during the flashing process.
5. Incorrect Configuration Settings: The configuration settings in the device tree or bootloader may not be set up correctly for SSD booting.

Troubleshooting Steps, Solutions & Fixes

Step-by-Step Instructions

1. Verify Flashing Environment:

   • Ensure you are using a native Ubuntu installation rather than a VM for flashing, as VMs can introduce complications.

2. Check USB Connections:

   • Test different USB ports on your host machine and use multiple high-quality USB cables to rule out hardware issues.

3. Update Host System:

   • Ensure your host system is up-to-date with all necessary drivers and packages:

     sudo apt update && sudo apt upgrade
     

4. Reboot and Retry Flashing:

   • Reboot both the host machine and the Jetson Orin Nano before attempting to flash again.

5. Use Correct Flashing Commands:

   • Use the following command structure for flashing:

     sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1p1 -c tools/kernel_flash/flash_l4t_external.xml --showlogs --network usb0 jetson-orin-nano-devkit internal
     

   • Ensure that you replace parameters as necessary based on your setup.

6. Check Serial Console Logs:

   • Connect a serial console to gather more detailed logs during boot attempts, which can provide insights into where the failure occurs.

7. Consult Documentation and Community Resources:

   • Refer to NVIDIA’s official documentation for troubleshooting steps specific to flashing and booting issues on Jetson devices.

Recommended Fixes

• Users have had success by ensuring they are using compatible images and avoiding VMs when flashing.
• If issues persist after following these steps, consider reaching out to NVIDIA support for further assistance.

Best Practices for Future Prevention

• Always verify that you are using compatible firmware files for your specific hardware configuration before attempting a flash.
• Keep a detailed log of all steps taken during flashing processes for future reference.
• Regularly check NVIDIA forums and documentation for updates regarding known issues with specific L4T versions.

Unresolved Aspects and Further Investigation

• Users continue to seek clarity on whether specific configurations can be reliably used across different generations of Jetson hardware.
• There may be additional troubleshooting steps required that are not fully documented in existing resources.

By following these troubleshooting steps and solutions, users can effectively address issues related to USB timeouts during the flashing process of their Jetson Orin Nano Developer Kit while ensuring compatibility with their hardware configurations.