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ERROR_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON
What Windows rejected: graphics invalid vidpn topology recommendation reason
Windows reports ERROR_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON (0xC026234D) at the vidpn checkpoint. Here, the reason code supplied while recommending a topology is not a recognized value. That narrows the first investigation to topology recommendation metadata instead of the entire GPU stack.
Treat recommendation reason as protocol metadata
The reason accompanies a topology recommendation and tells DMM why the driver or client proposes that arrangement. Capture the callback, client classification, proposed paths and the raw reason enum before any topology augmentation. Reuse the same topology with a documented reason value as the control. If that passes, do not alter mode sets or monitor timings: the rejected field was the recommendation metadata itself.
This result: VidPN handles and subobjects are generation-bound. A monitor hot-plug, docking action, session switch or mode commit can invalidate an otherwise well-formed cached object. The built-in one-line message identifies the immediate result; diagnosis also needs the producing API, object ownership and the display generation current at the time.
Build a useful diagnostic record
| Capture item | Why it matters for it |
|---|---|
| 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 |
| Object identity | topology recommendation metadata |
| Rejected boundary | the reason code supplied while recommending a topology is not a recognized value |
| Decisive capture | recommendation reason enum, client type, proposed topology and recommending DDI callback |
Preserve the unsigned HRESULT, symbolic name, first failing API and timestamp in one record. If cleanup later fails too, keep that secondary result separately from this result.
Separate state from capability
- Freeze the result generation. Record recommendation reason enum, client type, proposed topology and recommending DDI callback. Before diagnosing this result, do not resize, hot-plug, recreate or release the object under examination.
- Run the narrow this result comparison. use a documented reason value with the same topology. During the result comparison, keep every driver, monitor, resource format and unrelated policy unchanged.
- Observe the layer after it. for it, if the exact check passes, record the next HRESULT or visible outcome. A different downstream result shows that the boundary was crossed.
- Repeat it through a lifecycle transition. for it, exercise one relevant resize, mode switch, device recreation, hot-plug or session change and confirm that it does not reuse stale handles.
The comparison with ERROR_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM is especially useful: ERROR_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM concerns a different policy enum. Recording both names prevents a broad “graphics error” label from merging distinct ownership, capability and lifetime problems.
Verify the repaired path
Validate recommendation metadata before returning the candidate VidPN. Repair of it is complete only when the original call succeeds or returns its documented nonfatal status and the same lifetime test remains correct after a second display transition.
- The result trace identifies one producing API and one current graphics object, rather than only the final UI symptom.
- The passing run changes exactly the condition described for it; unrelated adapter, monitor and application state remains unchanged.
- debug-layer, ETW or driver diagnostics no longer report the rejected topology recommendation metadata contract during the same scenario.
- The application handles recurrence of it without an unbounded retry loop, leaked resource, duplicate composition target or stale topology handle.
Implementation notes
Log source and target IDs, topology generation, path descriptors, pinned modes, mode-set handles and monitor timing data. When the path returns a count, size, status flag or replacement object, retain it even on a nonfatal result because it can direct the next call.
A production fallback for it should be explicit: pause rendering, re-enumerate, rebuild one cache entry, recreate a device, or decline a protected path only when this layer calls for that action. Reinstalling every display component, deleting all caches or forcing a resolution change is not an evidence-based fix for it.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the topology recommendation metadata boundary involved in it.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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