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STATUS_GRAPHICS_NO_PREFERRED_MODE
The mode set is valid enough to exist, but lacks preference metadata
A mode set may enumerate several modes for a source or target. Some interfaces expect one mode to be marked as preferred so the VidPN manager can choose a reasonable default or build a recommendation. This status means the set has entries, but none is identified as the preferred mode.
The useful distinction is between an empty mode set and a non-empty mode set with incomplete preference information. For physical displays, preferred target mode data often comes from the monitor descriptor. For virtual or indirect displays, the driver may synthesize the set and must keep its preference rules consistent with what it reports as supported.
What to check
- Check whether the mode set is empty first; an empty set is a different failure.
- For real monitors, verify that descriptor parsing produced a preferred timing or that the driver intentionally supplied a fallback.
- For virtual paths, confirm that the synthesized preferred mode is also present in the same mode set and uses a unique mode ID.
References
- Microsoft: Enumerating cofunctional VidPN source and target modes
- Microsoft: Introduction to Video Present Networks
- Microsoft: D3DKMDT display data types
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