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Based on the context provided, it seems that the issue with the graphical environment not starting on your Colibri VF61 board is likely related to missing display drivers or incorrect X server configuration. Here are some steps you can take to address the issue:
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Check Display Drivers: Ensure that the necessary display drivers are included in your Yocto build. The error “Screen not found (EE)” suggests that the X server cannot detect a display, which could be due to missing drivers. Verify that the drivers for your specific display hardware are included.
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Verify X Server Configuration: Check the X server configuration files to ensure they are set up correctly for your hardware. The configuration might need adjustments to recognize the display.
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Add Necessary Layers: Review your
bblayers.confto ensure all necessary layers for X11 support are included. You might need additional layers that provide support for the graphical environment and display drivers. -
Display Manager: Consider configuring a display manager like LightDM or GDM to handle the graphical login automatically. This is typically required for starting a graphical session automatically at boot.
If these steps do not resolve the issue, you may need to further investigate the specific drivers and configurations required for your display hardware on the Colibri VF61 board.
Please, also check if these links can help you solve your problem:
i.mx6 dual display (HDMI+LVDS),qml application not running with two startx commands. - NXP Community.