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UCMUCSI_LIVEDUMP
USB Type-C UCSI live dump for UCMUCSI_LIVEDUMP
UCMUCSI_LIVEDUMP is bug check code 0x000001D4.
This live dump indicates that the UcmUcsi class extension encountered an error. Microsoft documents common examples such as UCSI command timeout or a client driver returning failure for a command.
How to read it in a dump
- Check UCSI command, connector, firmware, and client-driver status in the dump.
- Differentiate Type-C policy, PD firmware, ACPI UCSI transport, and client driver behavior.
- This value identifies a live dump and is not used as a conventional fatal bug check.
What to check
- Update BIOS/firmware, USB-C controller firmware, chipset, and Type-C drivers from the device vendor.
- Check USB Type-C, docking, power delivery, and alternate-mode event logs.
- Use Microsoft UCSI debugging guidance if command completion or firmware response is involved.
References
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