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ERROR_GRAPHICS_PARTIAL_DATA_POPULATED
Why this is not a generic GPU failure: graphics partial data populated
ERROR_GRAPHICS_PARTIAL_DATA_POPULATED, value 0x4026200A, is produced by graphics info when the API filled only the portion that fit and returned the size needed for the complete dataset. The investigation should stay attached to variable-length graphics query buffer and to the exact generation in which it was obtained.
The smallest evidence set
| Capture item | Why it matters |
|---|---|
| Object identity | variable-length graphics query buffer |
| Rejected condition | the API filled only the portion that fit and returned the size needed for the complete dataset |
| What to capture | input capacity, returned required count or byte size, structure version and whether topology changed between calls |
| Current graph state | WDDM kernel/miniport callback and the transient object state carried by that callback |
| Supporting trace | kernel graphics ETW, callback name, child or allocation identifiers, PnP state and the first returned NTSTATUS/HRESULT |
A/B test for the exact condition
- Perform the sizing call, allocate the reported capacity and repeat while holding the same query context.
The comparison with ERROR_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL is especially useful: ERROR_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL is a hard failure for a fixed caller array.
Safe remediation
Treat partial output as incomplete and retry with the reported size, allowing for one bounded topology-change retry.
- debug-layer, ETW or driver diagnostics no longer report the rejected variable-length graphics query buffer contract during the same scenario.
Technical references
- Microsoft: Graphics error codes — background for the variable-length graphics query buffer.
- Microsoft: DirectX graphics kernel subsystem
- Microsoft: Introduction to VidPNs
- Microsoft: WDDM TDR overview
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