Capacitive Touch Display 10.1" LVDS

Technical Support
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Hi Family Toradex Community,

I want to display my avalonia application on the ** Capacitive Touch Display 10.1" LVDS**

So, I have connected the display to the Verdin Development Carry Board following the Documentation here

Following the Evaluation and prototyping approach, I have edited the overlays.txt file by adding the
verdin-imx8mp_dsi-to-lvds_panel-cap-touch-10inch-lvds_overlay.dtbo to the overlays.txt file

Then I have run these commands my SoM’s Terminal:
sync
sudo reboot

but unfortunately I can not see the application is shown on the display

Any help ?

Best regards

2

Hi, I’m the Toradex AI Assistant. I’m in early beta, and I would appreciate your feedback.
The Toradex Support team will follow up with you shortly!

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Hello,

To address the issue of your Avalonia application not displaying on the Capacitive Touch Display 10.1 Inch via a Verdin Development Board, let’s ensure all necessary steps have been correctly followed and consider additional troubleshooting steps.

  1. Verify Display Connection: Double-check the physical connections between the display and the Verdin Development Board. Ensure that the Verdin DSI Display Adapter (if required for your setup) is correctly connected and that all cables are securely attached.

  2. Correct Device Tree Overlay: Confirm that the device tree overlay verdin-imx8mp_dsi-to-lvds_panel-cap-touch-10inch-lvds_overlay.dtbo is indeed the correct one for your display and module combination. The name suggests it’s for an LVDS panel, but your setup is DSI based. If you’re using a DSI display, ensure the overlay is specifically for DSI and not LVDS. The correct overlay name should closely match your hardware setup.

  3. Check the Overlays.txt File: After editing the overlays.txt file, ensure that no syntax errors are present and that the file is saved correctly. The overlay file name should be added without typos and should be on its own line if multiple overlays are being used.

  4. Validate Display Support: Ensure that the Linux image you are using supports the display out-of-the-box. Some displays may require additional drivers or configuration that are not included in the standard TorizonCore image.

  5. Debugging Output: Check the boot and system logs for any errors related to the display or DSI interface. You can use dmesg | grep -i dsi and dmesg | grep -i display to filter relevant messages. Look for any errors or warnings that could indicate a problem with the display initialization.

  6. Avalonia Application Configuration: Verify that your Avalonia application is configured to use the correct display output. Depending on how Avalonia is set up, it may require specific configuration to direct the graphical output to the correct screen.

  7. X11/Wayland Configuration: If your application relies on X11 or Wayland, ensure that the display server is correctly configured and recognizes the touch display as an output device. You can use xrandr (for X11) or weston-info (for Wayland) to list connected displays and their statuses.

  8. Test with a Different Application: To isolate the issue, try displaying a different application or

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

Capacitive Touch Display 10.1" DSI | Toradex Developer Center.

3

Hello @Ahmed49,

If I understand you correctly, you have a 10.1" DSI display. In that case, you should enable the overlay verdin-imx8mp_panel-cap-touch-10inch-dsi_overlay.dtbo. Could you please try again?

4

Hi Rudhi,

Thank you for the reply.

Sorry I have a mistake on the title, it is not a DSI, it is a LVDS Display
I just edited the overlays.txt file, so now the file looks like:
**fdt_overlays=verdin-imx8mp_hdmi_overlay.dtbo verdin-imx8mp_dsi-to-lvds_panel-cap-touch-10inch-lvds_overlay.dtbo **

and I have correctly conect the FFC. it works fine for both sceens( HDMIDisplay, LVDS Display)

Best Regards,
Ahmed49

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