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MILERR_DISPLAYSTATEINVALID
MILERR_DISPLAYSTATEINVALID is a Windows Media Integration Layer (MIL) HRESULT. It indicates that the display configuration changed, is unavailable, or otherwise cannot support the requested rendering step.
Diagnostic discriminator: Correlate the failure with the display-topology generation. If recreating display-dependent resources after hot-plug, DPI, mode, sleep, or unlock makes the same content render, stale display state is the decisive evidence.
What to check for MILERR_DISPLAYSTATEINVALID
- Check for monitor connection, resolution, DPI, sleep, lock, or display-mode changes around the failure.
- Recreate display-dependent resources after a graphics-device or display configuration reset.
- Delay the operation until the interactive display state becomes stable again.
Microsoft documentation about WPF hardware-accelerated rendering
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