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I have a desktop with an integrated graphics card, which i want to use, and a PCI graphics card. I would like to display video through the integrated graphics, and use the PCI card for CUDA based tasks, and not bog it down with video generation. Is there a way to select which one to use, and make it permenant?

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Which Linux distribution? What model of GPUs? –  Gilles Feb 23 at 23:53
    
Ubuntu 13.10 and they are both Nvidia –  TheDoctor Feb 23 at 23:54

1 Answer 1

I believe you can follow the directions outlined here in this post titled: Multiple Nvidia Video Cards & Monitors on Linux Mint 15 MATE. Even though the details are targeting Linux Mint they should still be applicable, since the bulk of the tweaking is being done through the NVIDIA drivers.

I would assume that you can do so either through the NVIDIA dialogs or through your xorg.conf file.

dialogs

   ss #1

xorg.conf files

Section "Device"
    Identifier     "Device2"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 610"
    BusID          "PCI:1:0:0"
    Screen          1
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 6200"
    BusID          "PCI:5:4:0"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GT 610"
    BusID          "PCI:1:0:0"
    Screen          0
EndSection

Then just only assign the displays to the internal "device":

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

This is just to give you the general approach, see the article for further details.

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