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Ubuntu 20.04 how to use PRIME to use iGPU on old notebook Intel + Nvidia GPU

參考這篇來使用舊核心kernel開機並安裝nvidia-340 舊機改造計畫之二 CPU and 顯示卡驅動  https://fullshinetw.ddns.net/jiu-ji-gai-zao-ji-hua-zhi-er/

新增開機參數 /etc/default/grub and update kernel boot parameter

nogpumanager nomodeset i915.modeset=1 quiet splash
sudo update-grub2

關閉 gpu-manager.service of systemctl 等同kernel cmdline參數nogpumanager

sudo systemctl disable gpu-manager.servic

新增Intel device參數 /etc/X11/xorg.conf.d/20-nvidia.conf

Section "Device"
        Identifier "My GPU"
        Driver "nvidia"
        Option "RegistryDwords" "EnableBrightnessControl=1;"
EndSection

Section "Device"
        Identifier "intel"
        Driver "modesetting"
        BusID "PCI:0:2:0"
EndSection

nvidia-smi command output

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