What does HRESULT 0xC02625E3 (ERROR_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED) mean?

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This function does not support GDI mirroring display devices because GDI mirroring display devices do not have any physical monitors associated with them.

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ERROR_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP	ERROR_GRAPHICS_INVALID_POINTER

ERROR_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED

Locate the failing graphics boundary: graphics mirroring devices not supported

ERROR_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED, value 0xC02625E3, is produced by gdi monitor when the API was given a GDI mirroring device that has no corresponding physical monitor object. The investigation should stay attached to physical-monitor mapping for mirror drivers and to the exact generation in which it was obtained.

Evidence that makes the result actionable

Capture item	Why it matters
Current graph state	GDI display-device enumeration, desktop attachment and physical-monitor mapping
Supporting trace	EnumDisplayDevices snapshot, DISPLAY_DEVICE flags, session ID, HMONITOR list and physical-monitor count
Object identity	physical-monitor mapping for mirror drivers
Rejected condition	the API was given a GDI mirroring device that has no corresponding physical monitor object
What to capture	DISPLAY_DEVICE flags, mirroring-driver identity, HMONITOR enumeration and requested monitor operation

A controlled comparison

Capture the failing state. Record DISPLAY_DEVICE flags, mirroring-driver identity, HMONITOR enumeration and requested monitor operation.
Choose a physical display output from current enumeration and compare with the mirror device.

The comparison with ERROR_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE is especially useful: ERROR_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE can occur for other devices with no monitor association.

Correction and proof

Exclude mirroring devices from physical monitor configuration paths.

debug-layer, ETW or driver diagnostics no longer report the rejected physical-monitor mapping for mirror drivers contract during the same scenario.

Implementation notes

Technical references

Microsoft: Multiple display monitors — background for the physical-monitor mapping for mirror drivers.
Microsoft: Monitor configuration functions
Microsoft: EnumDisplayDevices
Microsoft: Graphics error codes

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