NvAPI_EnumNvidiaDisplayHandle returns NVAPI_NVIDIA_DEVICE_NOT_FOUND

Hi,

I am running the sample code to change the monitor brightness using the I2C bus, but am failing at one of the first hurdles.

NvAPI_Initialize returns OK
NvAPI_EnumPhysicalGPUs returns OK
NvAPI_EnumNvidiaDisplayHandle returns NVAPI_NVIDIA_DEVICE_NOT_FOUND (-6)

What would be the cause of this?
I am running this on a laptop in case that matters.

Thanks!

did you get the solved, i got the same problem…

I’m afraid not.
Perhaps running the application and specifying that it should use the NVIDIA device rather than the Intel HD device, would help?