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ERROR_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE
Locate the failing graphics boundary: graphics invalid physical monitor handle
The useful interpretation of ERROR_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE (0xC026258C) starts at the monitor boundary: the handle was never valid for MCA or became invalid after release or display reconfiguration. In practical terms, inspect physical monitor handle lifetime before changing application-wide graphics settings.
This result: Physical monitor handles are not durable identifiers. They become stale after topology changes and must never be persisted or reused across enumeration generations. The built-in one-line message identifies the immediate result; diagnosis also needs the producing API, object ownership and the display generation current at the time.
Evidence that makes the result actionable
| Capture item | Why it matters for it |
|---|---|
| Current graph state | HMONITOR-to-physical-monitor enumeration and DDC/CI transaction |
| Supporting trace | physical-monitor handle generation, monitor description, VCP feature, DDC/CI exchange and display-change timestamp |
| Object identity | physical monitor handle lifetime |
| Rejected boundary | the handle was never valid for MCA or became invalid after release or display reconfiguration |
| Decisive capture | handle value, producing enumeration call, DestroyPhysicalMonitor order, HMONITOR and WM_DISPLAYCHANGE sequence |
Preserve the unsigned HRESULT, symbolic name, first failing API and timestamp in one record. If cleanup later fails too, keep that secondary result separately from this result.
A controlled comparison
- Freeze the result generation. Record handle value, producing enumeration call, DestroyPhysicalMonitor order, HMONITOR and WM_DISPLAYCHANGE sequence. Before diagnosing this result, do not resize, hot-plug, recreate or release the object under examination.
- Run the narrow it comparison. use a freshly enumerated handle and compare with the released or stale handle. During the result comparison, keep every driver, monitor, resource format and unrelated policy unchanged.
- Observe the layer after it. for it, if the exact check passes, record the next HRESULT or visible outcome. A different downstream result shows that the boundary was crossed.
- Repeat it through a lifecycle transition. for it, exercise one relevant resize, mode switch, device recreation, hot-plug or session change and confirm that it does not reuse stale handles.
The comparison with ERROR_GRAPHICS_MONITOR_NO_LONGER_EXISTS is especially useful: ERROR_GRAPHICS_MONITOR_NO_LONGER_EXISTS means Windows asynchronously removed the corresponding monitor. Recording both names prevents a broad “graphics error” label from merging distinct ownership, capability and lifetime problems.
Correction and proof
Scope handles to one enumeration generation and destroy them exactly once. Repair of it is complete only when the original call succeeds or returns its documented nonfatal status and the same lifetime test remains correct after a second display transition.
- The result trace identifies one producing API and one current graphics object, rather than only the final UI symptom.
- The passing run changes exactly the condition described for it; unrelated adapter, monitor and application state remains unchanged.
- debug-layer, ETW or driver diagnostics no longer report the rejected physical monitor handle lifetime contract during the same scenario.
- The application handles recurrence of it without an unbounded retry loop, leaked resource, duplicate composition target or stale topology handle.
Implementation notes
Log physical-monitor handle generation, monitor description, VCP feature, DDC/CI exchange and display-change timestamp. When the path returns a count, size, status flag or replacement object, retain it even on a nonfatal result because it can direct the next call.
A production fallback for it should be explicit: pause rendering, re-enumerate, rebuild one cache entry, recreate a device, or decline a protected path only when this layer calls for that action. Reinstalling every display component, deleting all caches or forcing a resolution change is not an evidence-based fix for it.
Technical references
- Microsoft: Using high-level monitor configuration functions — background for the physical monitor handle lifetime boundary involved in it.
- Microsoft: High-level monitor configuration API
- Microsoft: GetMonitorCapabilities
- Microsoft: Graphics error codes
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