Disagrees about version of symbol module_layout

Issue Overview

Users are experiencing issues related to the Intel AX210 Wi-Fi module on the Nvidia Jetson Orin Nano Developer Kit. The primary symptoms include:

• Failure to load specific kernel modules (IWLWIFI, IWLMVM, IWLDVM, CFG80211) which are set to be automatically inserted into the kernel.
• The command lsmod does not display these modules, indicating they are not loaded.
• An error message regarding Bluetooth firmware: "Failed to load Intel firmware file intel/ibt-0041-0041.sfi (-110)."

This problem occurs during the customization of the kernel (version r35.31, JetPack 5.1.1, kernel version 5.10.104-tegra). Users have noted that despite following configuration steps, Wi-Fi functionality remains unavailable.

The issue appears to be consistent among multiple users who have attempted similar setups, significantly impacting their ability to utilize Wi-Fi capabilities on the device.

Possible Causes

Several potential causes for this issue have been identified:

• Kernel Module and Image Mismatch: The kernel modules built do not match the currently running kernel image. This can lead to conflicts and loading failures.
• Configuration Errors: Incorrect settings in the kernel configuration may prevent the proper loading of modules.
• Driver Issues: Outdated or improperly compiled drivers may fail to interface correctly with the hardware.
• Environmental Factors: Power supply issues or overheating could affect module loading.
• User Misconfigurations: Beginners may inadvertently misconfigure settings or fail to follow necessary build steps.

Troubleshooting Steps, Solutions & Fixes

To address the issue, users can follow these troubleshooting steps:

1. Verify Kernel and Module Versions:

   • Run uname -r to check the current kernel version.
   • Ensure that both kernel modules and the kernel image are built from the same source version.

2. Rebuild Kernel Modules:

   • If you have only updated the kernel modules but not the kernel image, rebuild both.
   • Use the following commands to clean and rebuild:

     cd Linux_for_Tegra/source/public
     make clean
     make
     

3. Update Kernel Image:

   • After rebuilding, copy the new kernel image to /boot/Image:

     sudo cp path_to_your_new_image /boot/Image
     

4. Check Configuration Settings:

   • Ensure that in your .config file, options for IWLWIFI and related modules are set to y (built-in) rather than m (module). This prevents unnecessary loading issues.

5. Load Modules Manually:

   • If modules still do not load automatically, attempt manual loading using:

     sudo modprobe iwlwifi
     

6. Firmware Files:

   • Ensure that all required firmware files for Intel devices are present in /lib/firmware/. If missing, download them from Intel’s repository.

7. Check Dmesg Logs:

   • Use dmesg | grep iwlwifi to check for any additional error messages or clues regarding module loading issues.

8. Apply User-Published Patches:

   • Some users have reported success by applying specific patches shared in forums. Look for community-contributed solutions relevant to AX210 driver issues.

9. Documentation and Resources:

   • Refer to NVIDIA’s official documentation for guidance on building kernels from source: NVIDIA Kernel Customization Guide.

10. Best Practices:

    • Regularly update both JetPack and SDK Manager versions.
    • Maintain backups of working configurations before making changes.

By following these steps, users should be able to diagnose and potentially resolve issues related to Wi-Fi functionality on their Nvidia Jetson Orin Nano Developer Kit. Further investigation may be needed if problems persist after attempting these solutions.