Dual monitor with nvidia and with Unity 3d

[Steck!]

Yeah, it's working relatively well as is, (a bit of silliness with windows acting up in the second screen, but that's apparantly an actual bug).

I was asking how to enable Twinview using a second card. Something like this?

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 270.29  (buildd@allspice)  Fri Feb 25 14:42:07 UTC 2011

Section "ServerFlags"
    Option    "RandR" "on"
EndSection

Section "Monitor"

    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Samsung SyncMaster"
    HorizSync       30.0 - 81.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Monitor"

    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "ProView/EMC/PTS MLT3221"
    HorizSync       31.0 - 70.0
    VertRefresh     56.0 - 85.0
    Option         "DPMS"
    Option         "FlatPanelProperties" "native"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 295"
    BusID          "PCI:7:0:0"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 295"
    BusID          "PCI:6:0:0"
EndSection

Section "Screen"
    Identifier     "screen"
    Device         "Device0; Device1"
    DefaultDepth    24
    Option         "TwinView"
    Option         "MetaModes" "Monitor0: 960x720 @960x768, Monitor1: 1024x768"
    Option         "TwinViewOrientation" "Monitor1 RightOf Monitor0"
    Option         "HorizSync"   "Monitor0: 30.0 - 81.0; Monitor1: 31.0 - 70.0"
    Option         "VertRefresh" "Monitor0: 56.0 - 75.0; Monitor1: 56.0 - 85.0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

[mvega]

You may also consider combine the following:

1- Propietary NVIDIA drivers (nvidia-current)
2- A on-the-fly display switch utility like Disper. Add disper repository and install it by typing:

    sudo add-apt-repository ppa:disper-dev/ppa && sudo apt-get update
    sudo apt-get install disper

3- Install a disper indicator (use Alexander Egger's python indicator found in http://eggeral.blogspot.com/2011/04/...ng-nvidia.html

Use the new indicator to select displays operation mode as needed.