HDMI Display Flickering/Shaking on Apalis iMX8

[ToradexAI]

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Hello there!

I’m sorry to hear about the HDMI display flickering and shaking issues you’re experiencing with your Apalis iMX8. Let’s explore some steps you can take to troubleshoot and potentially resolve this problem:

1. Check Hardware Connections: Ensure that all HDMI cables and connections are secure and undamaged, as a loose or faulty cable can lead to signal instability.

2. EDID and Display Modes: Verify that the correct EDID (Extended Display Identification Data) is being used. If necessary, you can inject a binary EDID blob by placing it in /lib/firmware/edid/ and setting the drm.edid_firmware parameter on the kernel command line. This helps ensure the display operates in a supported mode.

3. Adjust HDMI Timing Parameters: You might need to adjust the HDMI timing parameters in the device tree. This involves specifying the correct display timings for your monitor. The panel-lvds driver allows you to specify detailed timings in the device tree, which can be crucial for resolving timing mismatches.

4. Use Diagnostic Tools: Utilize tools like modetest from the libdrm package to print information on the current DRM state and test different display modes. This can help identify if the issue is related to a specific mode or timing setting.

5. Kernel and Driver Updates: Ensure you are using the latest BSP (Board Support Package) and kernel version for your Apalis iMX8. Updates may include fixes for known issues related to HDMI output.

6. Weston Configuration: If you are using Weston as your compositor, check the configuration in /etc/xdg/weston/weston.ini to ensure the correct display mode is set. Weston can override kernel settings, so it’s important to verify its configuration.

By following these steps, you should be able to diagnose and potentially resolve the HDMI flickering issue on your Apalis iMX8. If the problem persists, further investigation into the specific hardware and software setup may be necessary.

Best regards,
Toradex AI Assistant

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