| Previous | Next |
| ERROR_GRAPHICS_I2C_ERROR_RECEIVING_DATA | ERROR_GRAPHICS_DDCCI_INVALID_DATA |
ERROR_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED
VCP support is advertised and implemented per monitor model
ERROR_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED means the monitor does not implement the requested Virtual Control Panel code through DDC/CI. VCP codes identify controls such as brightness, input selection, color presets, or vendor-specific functions; support varies by monitor, firmware, active input, and MCCS version.
Read the monitor capabilities string and compare its vcp(...) list with the requested hexadecimal code. The list is useful but not infallible: real monitors sometimes omit supported features or advertise commands that behave incorrectly. Distinguish a protocol-level unsupported reply from an I²C transport failure, and avoid writing guessed values to an unknown non-continuous feature.
Feature-level checks
- Requested VCP code and read or write operation.
- Raw capabilities string and reported MCCS version.
- Feature type: continuous, non-continuous, table, or vendor-specific.
- Whether support changes with the selected input or monitor mode.
References
- Microsoft: reading a VCP feature and its type
- ddcutil: parsing the VCP list in capabilities strings
- VESA: DDC/CI and MCCS standards
Looking for a different code? Search another status or error code.