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STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE
Video present target identifiers must be unique
Each video present target is identified by a target ID within the adapter context. This status means two target records attempted to use the same ID, making path construction and target-mode selection ambiguous.
Do not treat it as a cable or EDID problem first. The failure is in the adapter target namespace. It is commonly introduced by child-device enumeration, virtual-output synthesis, linked-adapter merging, or a restart path that re-adds targets without clearing previous records.
What to check
- Log all target IDs and associated connector or child-device information.
- Verify that dynamically created virtual targets receive IDs from the same allocator as physical targets.
- Clear or reconcile target inventory after PnP restart before adding new records.
References
- Microsoft: Introduction to Video Present Networks
- Microsoft: VidPN objects and interfaces
- Microsoft: D3DKMDT display data types
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