| Previous | Next |
| WU_S_SEARCH_LOAD_SHEDDING | ERROR_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT |
ERROR_MONITOR_NO_DESCRIPTOR
ERROR_MONITOR_NO_DESCRIPTOR means that the monitor-descriptor path did not return a usable block at all. It does not by itself prove that the panel is faulty or that a selected display mode is unsupported: Windows has no descriptor to parse yet.
Why this differs from nearby monitor errors
ERROR_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT and checksum errors require bytes to have been obtained. This code is earlier in the path: the graphics stack, adapter, dock, KVM, cable, or monitor did not provide a readable descriptor block for the current connection.
Useful checks
- Compare a direct connection with the path through a dock, KVM, receiver, converter, or extender. These devices can expose their own EDID or fail to pass through the display's data.
- Check whether Windows exposes a raw base block for the active display:
Get-CimInstance -Namespace root\wmi -ClassName WmiMonitorRawEEdidV1BlockNo instance or no active block supports the diagnosis that descriptor acquisition, rather than a particular timing field, is failing. Preserve a raw capture before applying a monitor INF override or replacing a cable.
Microsoft: WmiMonitorRawEEdidV1Block
Linux kernel documentation: common EDID acquisition failures
Looking for a different code? Search another status or error code.