Windows error 15207 (ERROR_MCA_UNSUPPORTED_COLOR

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The requested color-temperature preset is unsupported.

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ERROR_MCA_INVALID_TECHNOLOGY_TYPE_RETURNED	ERROR_AMBIGUOUS_SYSTEM_DEVICE

ERROR_MCA_UNSUPPORTED_COLOR_TEMPERATURE

This is a hardware-control failure

ERROR_MCA_UNSUPPORTED_COLOR_TEMPERATURE is returned in the Monitor Configuration API path when SetMonitorColorTemperature is asked to use a preset that the current physical monitor does not support. It concerns DDC/CI and MCCS monitor controls, not an ICC profile, Windows Night light, application color management, or a GPU color transform.

Ask the monitor before requesting a preset

The intended sequence is to call GetMonitorCapabilities for the physical monitor handle and examine both its capability flags and the supported-color-temperature mask. Only then should an application call SetMonitorColorTemperature with one of the documented presets. A missing capability is different from a valid capability whose accepted preset set is smaller than the application expected.

Common diagnostic mistakes

Using an HMONITOR as though it were already a physical monitor handle.
Assuming that an OSD color mode maps directly to an MCCS temperature preset.
Testing a preset through a docked or switched path and treating a video-successful connection as proof that the DDC/CI control path is available.
Retrying the same unsupported write repeatedly instead of recording the supported mask and choosing a supported operation.

Do not work around this by sending arbitrary VCP writes. Microsoft cautions that many displays do not fully implement MCCS, so a command that is accepted by one monitor can have undefined behavior on another.

References

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