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ERROR_GRAPHICS_INVALID_GAMMA_RAMP
What Windows rejected: graphics invalid gamma ramp
Windows reports ERROR_GRAPHICS_INVALID_GAMMA_RAMP (0xC0262347) at the vidpn checkpoint. Here, the gamma-ramp representation or values do not satisfy the selected path contract. That narrows the first investigation to VidPN path gamma data instead of the entire GPU stack.
Build a useful diagnostic record
| Capture item | Why it matters |
|---|---|
| Supporting trace | source and target IDs, topology generation, path descriptors, pinned modes, mode-set handles and monitor timing data |
| Object identity | VidPN path gamma data |
| Rejected condition | the gamma-ramp representation or values do not satisfy the selected path contract |
| What to capture | gamma type, control-point count, channel values, target ID, color basis and driver capability |
| Current graph state | VidPN, topology, source and target mode sets, and the present path connecting them |
Separate state from capability
- Apply the identity gamma ramp in the same path and compare with the rejected ramp.
The comparison with ERROR_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED is especially useful: ERROR_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED means the path cannot apply that ramp type.
Verify the repaired path
Validate ramp type, range and monotonic requirements before setting target gamma.
- debug-layer, ETW or driver diagnostics no longer report the rejected VidPN path gamma data contract during the same scenario.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the VidPN path gamma data.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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