I just tested this on a few machines (xps laptop, integrated graphics, windows 11; desktop PC, integrated graphics, windows 11; desktop PC, NVidia GT 1030, windows 10) and couldn’t get the assertion to fire on any of those.
Please could you try making the following changes in modules/juce_graphics/native/juce_DirectX_windows.h:
- Line 63, add
| D3D11_CREATE_DEVICE_DEBUGat the end of the statement to enable D3D debug mode. - Line 269, change
D2D1_DEBUG_LEVEL_NONEtoD2D1_DEBUG_LEVEL_INFORMATIONto enable D2D debug mode.
Then, re-run the program and inspect the console/debug output. The runtime should print a diagnostic message to explain the error. If you can provide the full text of the error, that will help us to debug further.