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UFX_LIVEDUMP
The UFX_LIVEDUMP bug check has a value of 0x00000198. This indicates that a UFX live dump occurred.
UFX_LIVEDUMP Parameters
| Parameter | Description |
|---|---|
| 1 | Failure type 0x1 : A class driver failed to activate the bus. 2 - Mask of enumerated child PDOs 3 - Mask of activated child PDOs 4 - Reserved |
| 2 | See parameter 1 |
| 3 | See parameter 1 |
| 4 | See parameter 1 |
Live dumps do not reset the OS, but allow for the capture of memory information for abnormal situations where the operating system can continue.
Diagnostic approach
UFX_LIVEDUMP records an abnormal USB function-class framework condition without necessarily stopping Windows. For failure type 0x1, the class driver failed to activate the bus, so inspect the UFX/class-driver stack, controller and endpoint state, device power state, and the request that preceded bus activation.
Correlate the live dump with USB/UFX event logs and repeated activation attempts. Preserve the class-driver and controller versions plus the device state from the same incident. Because this is a live dump, continued system operation does not turn the recorded UFX failure into a generic system crash; diagnosis should remain focused on the bus-activation path represented by the dump.
References
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