Controlling Samsung Odyssey Neo G9 57" (G95NC) Core Lighting over DDC/CI: the three undocumented VCP codes
TL;DR. The G95NC's rear CoreSync+ lighting is fully readable and mostly writable over plain DDC/CI, through three manufacturer-specific VCP codes that the monitor does not advertise in its capabilities string:
| VCP | Meaning | Range | Writable |
|---|---|---|---|
0xF8 |
Lighting source | max 17 | only 0x00 (off) / 0x01 (manual) |
0xF9 |
Lighting effect mode | max 5 | yes, in manual mode |