Current xorg.conf

xorg.conf

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 340.96  (buildmeister@swio-display-x86-rhel47-05)  Sun Nov  8 22:50:27 PST 2015

# nvidia-xconfig --query-gpu-info
# lspci -nn | grep VGA

Section "ServerLayout"
    Identifier     "Layout0"
    Screen         "Thinkpad Screen" 
EndSection

Section "Monitor"
    Identifier     "VGA1"
    Modeline       "1280x1024_60.00"  109.00  1280 1368 1496 1712  1024 1027 1034 1063 -hsync +vsync
    ModelName      "DELL 1708FP"
    Option "PreferredMode" "1280x1024_60.00"
EndSection

Section "Monitor"
    Identifier     "Thinkpad Display"
    Option         "DPMS"
EndSection

Section "Device"
    Identifier "Intel Device 0"
    Driver "intel"
    BusID "PCI:0@0:2:0"
    Option "AccelMethod" "None"
EndSection


Section "Device"
    Identifier     "Nvidia Device 0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "NVS 4200M"
    BusID          "PCI:1@0:0:0"
EndSection 

Section "Screen"
    Identifier     "DisplayPort Screen"
    Device         "Nvidia Device 0"
    Monitor        "DisplayPort Monitor"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "TwinViewXineramaInfoOrder" "CRT-0"
    Option         "metamodes" "DFP: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "VGA Screen"
    Device         "Nvidia Device 0"
    Monitor        "VGA1"
    DefaultDepth 24
    SubSection "Display"
        Modes "1280x1024_60.00"
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Thinkpad Screen"
    Device         "Intel Device 0"
    Monitor        "Thinkpad Display"
    DefaultDepth    24
    SubSection     "Display"
    Depth       24
    EndSubSection
EndSection