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MILAVERR_UNKNOWNHARDWAREERROR
MILAVERR_UNKNOWNHARDWAREERROR belongs to WPF media runtime, seek, and player lifetime. The media rendering path received an unclassified hardware or driver failure.
Locate the first rejecting layer
After a media object opens, asynchronous work continues in source, network, decoder, player, and rendering components. Seek requests, Close, unload, callbacks, and device failures can race with that work. The first operation returning the MILAV status must be correlated with player generation and event order so a stale callback is not mistaken for a content or codec defect.
the graphics, video-decode, presentation, or device path that returned a hardware-related failure without a narrower MIL mapping.
Controlled reproduction
Assign a generation number to each player instance and reject callbacks from older generations. Reproduce open, optional seek, play, stop, and close with explicit timestamps before adding network sources, DRM, or UI navigation.
- Compare software rendering or decoding.
- Reproduce with a minimal source and no effects.
- Test another adapter or a known-good driver.
- Capture device-removal reason before recreating resources.
Evidence to preserve
- Adapter, driver, device-removal reason, and TDR events
- Media format, resolution, acceleration mode, and resource pressure
- Lowest Direct3D, DXGI, or driver HRESULT
- System event and reliability timeline
Misleading responses
This code is intentionally broad; it should not be interpreted as proof of permanent physical damage without lower-level evidence. Do not treat the constant name as a complete root-cause report; preserve the nested media, COM, graphics, or driver result before resetting the player.
Technical references
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