mjhjmtu

I managed to setup external monitor as I want via /etc/X11/xorg.conf configuration file:

Section "ServerLayout"
 Identifier "Layout0"
 Screen 0 "Screen0" 0 0
 InputDevice "Keyboard0" "CoreKeyboard"
 InputDevice "Mouse0" "CorePointer"
 Option "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

 # generated from default
 Identifier "Mouse0"
 Driver "mouse"
 Option "Protocol" "auto"
 Option "Device" "/dev/psaux"
 Option "Emulate3Buttons" "no"
 Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

 # generated from default
 Identifier "Keyboard0"
 Driver "kbd"
EndSection

Section "Monitor"
 Identifier "Monitor0"
 VendorName "Unknown"
 ModelName "SAMSUNG"
 HorizSync 26.0 - 81.0
 VertRefresh 24.0 - 75.0
 Option "DPMS"
 Option "DPI" "96 x 96"
EndSection

Section "Device"
 Identifier "Device0"
 Driver "nvidia"
 VendorName "NVIDIA Corporation"
 BoardName "GeForce GTX 960M"
EndSection

Section "Screen"
 Identifier "Screen0"
 Device "Device0"
 Monitor "Monitor0"
 DefaultDepth 24
 Option "UseEdidDpi" "False"
 Option "Stereo" "0"
 Option "nvidiaXineramaInfoOrder" "DFP-0"
 Option "metamodes" "1680x1050 +0+0"
 Option "SLI" "Off"
 Option "MultiGPU" "Off"
 Option "BaseMosaic" "off"
 SubSection "Display"
 Depth 24
 EndSubSection
EndSection

But how do I setup dual screen mode? nvidia-settings only detects one monitor, as does xrandr -q:

 Screen 0: minimum 8 x 8, current 1680 x 1050, maximum 16384 x 16384
HDMI-0 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 160mm x 90mm
 1920x1080 60.00 + 59.94 50.00 29.97 25.00 23.98 60.05 60.00 50.04 
 1680x1050 59.95* 
 1600x1200 60.00 
 1440x900 74.98 59.89 
 1360x768 60.02 
 1280x1024 75.02 60.02 
 1280x960 60.00 
 1280x800 59.81 
 1280x720 60.00 59.94 50.00 
 1152x864 75.00 
 1024x768 75.03 70.07 60.00 
 800x600 75.00 72.19 60.32 
 720x576 50.00 
 720x480 59.94 
 640x480 75.00 72.81 59.94 
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)

Also, if it's possible, I would like to have automatic switching between intel and nvidia GPU, since I have both (dual GPU). This works on Windows 10 out-of-the-box.