Ubuntu 20.04 fresh install looking for how to use PRIME to use iGPU on desktop intel + GTX 1060

Graphics / Linux Linux
1

I posted in askubuntu, but figure this may actually be an issue with me not knowing how to use PRIME

Essentially I’ve read a bit here on what PRIME is, and it seems to be taking the dGPU and rendering X with it… I would guess to help the iGPU? I do not want this however, because this desktop is for deep learning experimentation and therefore I want to tell PRIME to stop using the dGPU for X rendering and leave it free for PyTorch, Tensorflow, etc…

is the answer in these areas ?

or

Thank you

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2

Just use
sudo prime-select on-demand
and reboot. This will render graphics on the igpu and leave the nvidia gpu powered.

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Done, but still seeing some action on the NVIDIA GPU at idle… is it not expected to vacate the entire VRAM?

image
image1523×655 270 KB

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4

The driver gets loaded by the Xserver to stay ready for on-demand rendering. Also disabling this requires additional changes. Please run nvidia-bug-report.sh as root and attach the resulting nvidia-bug-report.log.gz file to your post. You will have to rename the file ending to something else since the forum software doesn’t accept .gz files (nifty!).

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nvidia-bug-report.log.gz.log (364.6 KB)

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6

Please try this:

  • add ‘nogpumanager’ kernel parameter
  • delete /usr/share/X11/xorg.conf.d/11-nvidia-offload.conf
  • create /etc/X11/xorg.conf with contents:
Section "Device"
    Identifier     "intel"
    Driver         "modesetting"
    BusID          "PCI:0:2:0"
EndSection
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7

regarding the kernel parameter… you’re meaning something like the following ?

https://wiki.ubuntu.com/Kernel/KernelBootParameters

8

yes.

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That did it! Spot on, thank you sir! Cannot let a single byte of that VRAM go to waste you understand… saving my pennies now for something soon.

Thank you!

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