I have an Intel CPU with iGPU and also a dGPU (Nvidia). I intend to use the dGPU for its CUDA so as the result, my monitor is connected to the iGPU.
Still when I open the nvtop tool, I can see that some of the dGPU memory is consumed even though I’m not doing anything with it. I assume it’s because the dGPU is still part of the display output even though the cable is connected to the motherboard. I have this suspicion especially since if I take the HDMI out and connect it to the dGPU, I’ll get video output.
My question is, how can I ask the OS not to use the dGPU as part of the display output and leave all its memory unallocated?
My current display driver situation:
sudo mhwd -li
> Installed PCI configs:
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NAME VERSION FREEDRIVER TYPE
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video-modesetting 2020.01.13 true PCI
video-linux 2018.05.04 true PCI
video-hybrid-intel-nvidia-prime 2021.11.04 false PCI