Adaptation issue

Technical Support
1

Hello! Our company recently conducted kernel compilation tests on the Apalis Evaluation Board Rev 1.1 based on the guidance in your developer centre document “Build Linux Kernel from Source Code | Toradex Developer Center”. We would like to consult with you regarding the technical phenomena encountered and kindly request your guidance.

  1. Operating procedure:
    ● Compile the Linux kernel from the BSP 7.1.0+build3 version source code
    ● Replace the Image.gz file in the original BSP package
    ● Deploy to the development board using the Toradex Easy Installer tool.
  2. Abnormal Phenomena:
    ● No video output after system startup (HDMI interface)
    ● USB peripherals not recognised (keyboard, USB drive, etc.)
    ● Serial terminal can connect normally and execute command line operations.
  3. Comparison Validation:
    ● Video output and USB functions are normal when deploying with the original BSP image
    ● Hardware connections and power supply conditions remain completely consistent…
    Please confirm:
  • Does the phenomenon described above align with the expected behaviour after kernel replacement?
  • If it is an abnormal phenomenon, what are the possible compilation/deployment steps that may need correction?
  • Are there any driver module compilation configuration items that require special attention?
2

@cli ,

When building kernel from source code and deploying it to Apalis iMX8, graphical functionality may not work as the original bsp. Ref: Build Linux Kernel from Source Code | Toradex Developer Center

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You could change kernel config from Yocto Project and rebuild the image.

bitbake -c menuconfig virtual/kernel

Ref:Build a Reference Image with Yocto Project/OpenEmbedded | Toradex Developer Center