Adaptation issue

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?

@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

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