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STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK
The serial-number descriptor is not usable identity data
STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK concerns the descriptor intended to hold the monitor serial number. It does not mean that every form of device identity is absent: connector identity, EDID manufacturer/product fields, and operating-system instance identifiers are different data sources with different lifetimes.
The block can be missing, malformed, or inconsistent with the descriptor format expected by the display stack. Do not substitute a Windows-generated display name as if it were a manufacturer-provided serial number, and do not use a corrupted serial block as a stable key for licensing, inventory, or calibration data.
What to check
- Retain the raw descriptor block and the monitor instance identity used to obtain it.
- Distinguish absence of a serial-number descriptor from checksum failure of the entire EDID block.
- Use an explicit fallback identity policy in inventory software rather than silently conflating multiple monitors.
References
- Microsoft: WmiMonitorRawEEdidV1Block
- VESA Enhanced EDID Standard, Release A2
- Linux kernel: EDID troubleshooting and overrides
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