Screen Capture Issue on Wayland Application Running with Weston Compositor on iMX7D SoM

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It seems like you’re encountering issues with screen capturing in a Wayland + Weston setup on a Toradex iMX7D SoM. Here are a few suggestions and considerations based on the context provided:

  1. Grim and Fgrab: These tools might not be fully compatible with your current setup or the Wayland compositor configuration. Ensure that the Wayland environment is correctly set up and that the tools are compatible with the version of Weston you are using.

  2. Framebuffer Approach: Accessing /dev/fb0 directly might not work as expected in a Wayland environment, as Wayland does not use the framebuffer in the same way X11 does. This approach is generally not recommended for Wayland.

  3. Wayland Display Socket: Ensure that the Wayland display socket is correctly mapped and accessible within your Docker container. The environment variable WAYLAND_DISPLAY=wayland-0 should match the socket name used by Weston.

  4. XDG_RUNTIME_DIR Warning: The warning about XDG_RUNTIME_DIR suggests a potential misconfiguration. Ensure that the directory has the correct permissions and ownership. The directory should be owned by the user running Weston and have permissions set to 0700.

  5. Weston Configuration: Check the weston.ini configuration file for any settings that might affect screen capturing. Ensure that the necessary modules for screen sharing or capturing are loaded.

  6. Alternative Methods: Consider using Weston’s built-in screencast functionality. According to the context, you can start and stop screencast recording with the <mod-key> + r combination. Ensure that the modifier key is correctly set in the weston.ini file.

  7. Debugging: Use WAYLAND_DEBUG=1 to get more detailed logs about what is happening with the Wayland connection. This might provide more insights into why the screen capture is resulting in blank screens.

If these suggestions do not resolve the issue, it might be beneficial to consult additional resources or reach out to the Toradex community for further assistance.

Please, also check if these links can help you solve your problem:

https://bbs.archlinux.org/viewtopic.php?id=177123

https://community.nxp.com/t5/i-MX-Processors/Permanent-calibration-problem-on-weston/m-p/1265864.