| Previous | Next |
| ERROR_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST | ERROR_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST |
ERROR_GRAPHICS_I2C_NOT_SUPPORTED
A working video link does not guarantee a monitor-control bus
ERROR_GRAPHICS_I2C_NOT_SUPPORTED indicates that the selected physical monitor cannot be reached through the I²C transport expected by the Windows Monitor Configuration API. DDC/CI normally rides on the display data channel, but KVMs, docks, adapters, virtual displays, and some internal panels may pass video while omitting or blocking monitor-control traffic.
Confirm that the application opened a physical-monitor handle rather than relying only on HMONITOR. Test the same display with a direct cable and verify whether DDC/CI is enabled in the monitor's on-screen menu. This status is a transport-capability result; changing the VCP feature code cannot help until an I²C/DDC path exists.
Transport checks before testing VCP codes
- Physical connector, cable, dock, KVM, and adapter chain.
- Whether EDID is readable even though DDC/CI commands fail.
- Monitor on-screen setting that enables or disables DDC/CI.
- Result with a direct connection to the graphics adapter.
References
- Microsoft: Monitor Configuration uses DDC/CI
- Microsoft: MCCS over an I²C interface
- ddcutil: relationship between DDC/CI and I²C
Looking for a different code? Search another status or error code.