Jetson ORIN USB Unable to Detect HUB

Issue Overview

Users are experiencing difficulties with the Nvidia Jetson Orin Nano Dev board, specifically related to USB hub detection. The main symptoms include:

• Inability to detect USB hubs and connected devices: Users report that while other peripherals work correctly, the USB hub connected to the Orin Nano is not recognized.
• Context of the problem: This issue arises during the integration of a custom carrier board with the Jetson Orin Nano System on Module (SOM). Users have successfully used the same carrier board with the Jetson Nano SOM without issues.
• Hardware specifications: The custom carrier board is designed to be pin-compatible with the Jetson Orin Nano, and users have confirmed that USB connections are made correctly according to their schematics.
• Frequency of occurrence: This appears to be a consistent issue for users attempting to adapt their designs from the Jetson Nano to the Orin Nano.
• Impact on user experience: The inability to detect the USB hub severely limits functionality, as users cannot connect additional devices, impacting their development and testing processes.

Possible Causes

Several potential causes may lead to this issue:

• Hardware incompatibilities or defects: Although the boards are designed to be pin-compatible, differences in power requirements or signal integrity could cause detection failures.

• Software bugs or conflicts: There may be unresolved software issues specific to the Jetson Orin Nano that affect USB detection.

• Configuration errors: Incorrectly configured device trees or settings may prevent proper recognition of USB devices.

• Driver issues: Outdated or incompatible drivers might not support the new hardware configuration.

• Environmental factors: Power supply inconsistencies or temperature issues could affect performance.

• User errors or misconfigurations: Mistakes in wiring or setup could lead to detection failures, despite following schematics.

Troubleshooting Steps, Solutions & Fixes

To resolve the USB detection issue on the Jetson Orin Nano Dev board, follow these comprehensive troubleshooting steps:

1. Verify Hardware Connections:

   • Double-check all wiring according to your schematics. Ensure that USB2_AP_N and USB2_AP_P pins are correctly connected.
   • Confirm that reset pins are pulled high and not keeping the hub in a reset state.

2. Consult Documentation:

   • Refer to the Jetson Orin Nano Series Interface Comparison & Migration Application Note for insights on pin compatibility and design considerations.
   • Review the Orin Nano Design Guide and its schematic checklist for potential design flaws.

3. Update Device Tree:

   • Follow instructions in the Jetson Module Adaptation and Bring-Up Guide to update your device tree configuration. This is crucial for ensuring that the system recognizes connected devices properly.

4. Test with Different Configurations:

   • If possible, test your USB hub with a known working setup (e.g., using a different carrier board) to isolate whether the issue lies with your custom design or with the hub itself.

5. Check for Software Updates:

   • Ensure that you are using the latest firmware and driver versions for your Jetson Orin Nano. Check Nvidia’s official resources for any updates that might address USB issues.

6. Examine Power Supply:

   • Make sure that your power supply meets the requirements for both the Jetson Orin Nano and any connected peripherals. Inadequate power can lead to detection problems.

7. Log System Information:

   • Use terminal commands like dmesg or lsusb to gather logs about USB device recognition attempts. This can provide insights into what might be going wrong.

   dmesg | grep usb
   lsusb
   

8. Community Support and Further Investigation:

   • If issues persist after following these steps, consider reaching out on forums or Nvidia’s support channels for additional assistance. Document any error messages or unusual behavior observed during troubleshooting for more effective support.

By following these steps, users can systematically diagnose and potentially resolve issues related to USB hub detection on their Jetson Orin Nano Dev boards.