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STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED
The path is unsupported, not merely full
Unlike the unavailable-aperture status, this result means the current allocation cannot be unswizzled by an aperture at all. A retry after unrelated work completes is therefore not the primary fix; the driver and allocation layout need a different access strategy.
Validate the declared capabilities
Inspect the allocation flags, segment properties, CPU visibility, and the miniport implementation of aperture mapping. A supported alternative may be a staging allocation, an explicit copy, or a differently created resource. Do not assume that every GPU-visible allocation is directly CPU lockable.
References
- Microsoft: allocation flags for swizzled allocations
- Microsoft: GPU segments and aperture mappings
- Microsoft: NTSTATUS reference
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