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STM32H7S78-DK, Touchgfx & Threadx Blank Screen

Hi, 

I've created a project with cubemx, copying the configuration generated with touchgfx designer for this board with the only change being that I wish to use threadx instead of FreeRTOS.  I'm able to compile and flash to the board and after hours of debugging I can't seem to find what the issue might be, everything seems to be working fine but all I get is a blank screen.  I've updated the linker script to use external ram (just as it is when generating the project via touchgfx designer) and when debugging I can step through the boot and application program no issue, no errors or faults.  

Has anyone run into this before and got out of it?  I tried just about everything that I can think of at this point.  

Additional info:

-Stm32CubeIDE Version: 1.18.1
-Stm32CubeMX Version: 6.14.1
-Touchgfx Designer Version: 4.25.0
-Threadx version: 6.4.0
-Touchgfx generator version: 4.25.0

Thank you.  

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