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STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER
The driver does not own the POSTed display device
STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER is a Windows NTSTATUS value from the graphics/display facility. For STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER, it belongs to the WDDM kernel display stack rather than to a Win32 GDI error alone, so the useful context is usually the adapter, VidPN object, child device, present path, or primary allocation involved in the call.
During boot, one display adapter may be the POSTed device that firmware used for early display output. This status means the driver trying to start is not the driver for that POSTed display adapter when the operation requires that relationship.
The issue is ownership and boot-display identity, not normal monitor detection. It can appear on multi-GPU systems, after driver replacement, or when firmware-selected display output differs from the adapter being initialized by the current path.
What to check for STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER
- Record which adapter firmware POSTed and which driver is attempting the start.
- Check BIOS/UEFI display selection and hybrid graphics policy.
- Avoid applying POST-device-only assumptions to a non-POST display adapter.
References for STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER
- Microsoft: Display/graphics driver DDI overview
- Microsoft: MS-ERREF NTSTATUS values
- Microsoft: Automatic Display Switch
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