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ERROR_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION
What Windows rejected: graphics cancel vidpn topology augmentation
Windows reports ERROR_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION (0xC026235A) at the vidpn checkpoint. Here, the miniport asked DMM to stop augmenting the candidate topology for the specified source. That narrows the first investigation to driver-requested topology augmentation cancellation instead of the entire GPU stack.
Build a useful diagnostic record
| Capture item | Why it matters |
|---|---|
| Object identity | driver-requested topology augmentation cancellation |
| Rejected condition | the miniport asked DMM to stop augmenting the candidate topology for the specified source |
| What to capture | source ID, candidate topology, augmentation reason, driver callback and preceding constraints |
| Current graph state | VidPN, topology, source and target mode sets, and the present path connecting them |
| Supporting trace | source and target IDs, topology generation, path descriptors, pinned modes, mode-set handles and monitor timing data |
Separate state from capability
- Repeat with a minimal topology that does not require the rejected augmentation.
The comparison with ERROR_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY is especially useful: ERROR_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY means no recommendation could be produced.
Verify the repaired path
Honor the cancellation and let DMM choose another candidate instead of forcing the partial topology.
- debug-layer, ETW or driver diagnostics no longer report the rejected driver-requested topology augmentation cancellation contract during the same scenario.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the driver-requested topology augmentation cancellation.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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