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ERROR_GRAPHICS_MODE_NOT_IN_MODESET
Locate the failing graphics boundary: graphics mode not in modeset
ERROR_GRAPHICS_MODE_NOT_IN_MODESET, value 0xC026234A, is produced by vidpn when the mode object was supplied to a mode set that does not contain it. The investigation should stay attached to mode-set membership and to the exact generation in which it was obtained.
Nearest useful distinction: This value corresponds to “Specified mode is not in the specified mode set.” Keep that condition separate from adjacent errors that may expose the same high-level symptom.
Evidence that makes the result actionable
| Capture item | Why it matters |
|---|---|
| What to capture | mode ID, mode-set handle, source/target owner, topology generation and enumeration order |
| 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 | mode-set membership |
| Rejected condition | the mode object was supplied to a mode set that does not contain it |
A controlled comparison
- Capture the failing state. Record mode ID, mode-set handle, source/target owner, topology generation and enumeration order.
- Reacquire the correct mode set and select a mode enumerated from it.
The comparison with ERROR_GRAPHICS_MODE_NOT_PINNED is especially useful: ERROR_GRAPHICS_MODE_NOT_PINNED means a member exists but no mode is pinned.
Correction and proof
Retain owner mode-set identity with each mode and invalidate it after reassignment.
- debug-layer, ETW or driver diagnostics no longer report the rejected mode-set membership contract during the same scenario.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the mode-set membership.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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