CL-SOM-iMX8X: Yocto Linux: Manual Installation: SD card

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This article provides instructions needed to install the Yocto Linux SD-card image on SD card using a Linux Host workstation. The image provides a full boot system including U-Boot, Linux kernel, device driver modules and example root filesystem.

Preparation steps

  • Obtain a Linux PC workstation.
  • Obtain a USB Card reader and a micro-SD Card. Any commercially available micro-SD card of 4GB (or larger) may be used for the installation.
  • Download the CL-SOM-iMX8X Yocto Linux package from CompuLab website.
  • Unzip the package to a directory on the host workstation.
  • The Yocto Linux SD-card image file, mentioned below, can be found in the images subdirectory.
  • Plug the USB SD Card reader into the host PC. Insert the micro-SD Card into the USB Card reader. From now we assume the device name of the MMC/SD card on your Linux PC is /dev/sdX.


  • Flash the image file to the micro-SD card:
bzcat ~/path/to/cl-som-imx8x-yocto-linux/images/cl-som-imx8x.sdcard.bz2 | sudo dd of=/dev/sdX bs=1M

Run Yocto Linux image

  • Insert the micro-SD card into the SD card socket P13.
  • Connect a standard USB cable (included in the kit) between your host PC and the evaluation kit micro-USB2.0 connector P12.
    Use a terminal emulator as described here
  • Power on the system.
  • The system will automatically boot into Linux.

Admolition note.png The above procedure assumes default U-boot settings. In case the U-boot boot environment variables have been altered, it might be necessary to restore the default environment.

When U-Boot starts press any key to stop autoboot. Set the correct U-Boot environment in the U-Boot prompt:

=> env default -a
=> saveenv
=> reset