xorg.conf

Section "ServerLayout"
        Identifier     "layout"
        Option         "AllowNVIDIAGPUScreens"
        Screen      0  "iGPU" 0 0
EndSection

Section "Files"
    ModulePath   "/usr/lib/x86_64-linux-gnu/nvidia/xorg"
        ModulePath   "/usr/lib/xorg/modules"
        FontPath     "/usr/share/fonts/X11/misc"
        FontPath     "/usr/share/fonts/X11/cyrillic"
        FontPath     "/usr/share/fonts/X11/100dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/75dpi/:unscaled"
        FontPath     "/usr/share/fonts/X11/Type1"
        FontPath     "/usr/share/fonts/X11/100dpi"
        FontPath     "/usr/share/fonts/X11/75dpi"
        FontPath     "built-ins"
EndSection

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

Section "Screen"
        Identifier "iGPU"
        Device     "iGPU"
    DefaultDepth 24
        SubSection "Display"
                Viewport   0 0
        EndSubSection
EndSection

Section "Device"
        Identifier  "dGPU"
        Driver      "nvidia"
        BusID       "PCI:3:0:0"
EndSection

Section "OutputClass"
    Identifier   "iGPU"
    MatchDriver  "i915"
    Driver       "modesetting"
EndSection

Section "OutputClass"
    Identifier   "dGPU"
    MatchDriver  "nvidia-drm"
    Driver       "nvidia"
    Option       "AllowEmptyInitialConfiguration"
    Option       "PrimaryGPU" "Yes"
    ModulePath   "/usr/lib/x86_64-linux-gnu/nvidia/xorg"
    ModulePath   "/usr/lib/xorg/modules"
EndSection