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Views: 16,039     Votes:  4 
Tags: unity   nvidia   xorg   cpu   gpu  
Link: 🔍 See Original Answer on Ask Ubuntu ⧉ 🔗

URL: https://askubuntu.com/q/1056431
Title: Force Xorg to use CPU not GPU
ID: /2018/07/16/Force-Xorg-to-use-CPU-not-GPU
Created: July 16, 2018    Edited:  February 21, 2019
Upload: March 26, 2024    Layout:  post
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This answer: Use integrated graphics for display and NVIDIA GPU for CUDA on Ubuntu 14.04 appears relevant for you.

In summary setting up /etc/X11/xorg.conf as follows:

Section "ServerLayout"
    Identifier "layout"
    Screen 0 "intel"
    Screen 1 "nvidia"
EndSection

Section "Device"
    Identifier "intel"
    Driver "intel"
    BusID "PCI:0@0:2:0"
    Option "AccelMethod" "SNA"
EndSection

Section "Screen"
    Identifier "intel"
    Device "intel"
EndSection

Section "Device"
    Identifier "nvidia"
    Driver "nvidia"
    BusID "PCI:1@0:0:0"
    Option "ConstrainCursor" "off"
EndSection

Section "Screen"
    Identifier "nvidia"
    Device "nvidia"
    Option "AllowEmptyInitialConfiguration" "on"
    Option "IgnoreDisplayDevices" "CRT"
EndSection

Read the entire post for more details.


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According Asus Canada specs:

Integrated Graphics Processor- Intel® HD Graphics support Multi-VGA
output support : HDMI/DVI-D/RGB/DisplayPort ports

I suggest temporarily taking out your two nVidia cards, plugging a monitor into the on-board HDMI port and booting with a Live USB to runs tests with Ubuntu.

It is important to know your CPU. Discover this using:

cat /proc/cpuinfo | grep 'model name'

and report back.

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