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ERROR_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED
What Windows rejected: graphics gamma ramp not supported
ERROR_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED (0xC0262348) belongs to the vidpn layer. It marks the ramp is valid but the target path does not advertise gamma-ramp support, rather than a generic rendering failure. The object that owns the decision is gamma capability of a present path.
Build a useful diagnostic record
| Capture item | Why it matters |
|---|---|
| Object identity | gamma capability of a present path |
| Rejected condition | the ramp is valid but the target path does not advertise gamma-ramp support |
| What to capture | requested ramp type, path gamma support, target mode, output technology and current color pipeline |
| 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
- Use an advertised gamma mode or identity ramp on the same path.
The comparison with ERROR_GRAPHICS_INVALID_GAMMA_RAMP is especially useful: ERROR_GRAPHICS_INVALID_GAMMA_RAMP reports malformed or invalid ramp content.
Verify the repaired path
Query path capability and fall back without altering unrelated display modes.
- debug-layer, ETW or driver diagnostics no longer report the rejected gamma capability of a present path contract during the same scenario.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the gamma capability of a present path.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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