Re: Dualhead on laptop

[Jason Kraftcheck <kraftche@cae.wisc.edu>]

Nicolas wrote:
> Anyone get an exernal monitor working as a second screen (not twinview) with 
> geforce2go (or what ever card you have)?  I tried as in the nVidia doc, but 
> without success.  If I don't specify "screen 0" or "screen 1" in the Device 
> section, the second monitor don't receive signal.  If I specify it, the 
> laptop freeze :o(  If you need my XF86Config file, just let me know.

If you are using NVidia's twin-view feature, then the driver presents the 
both screens to the xserver as a single screen.  You should have only one 
Screen section.  You need to read NVidia's documentation on how to set up 
twinview.  My guess is that you probably want to add something like the 
following to your 'Device' section:

    # Enable Twinview
    option "TwinView"        "true"

    # Force types of connected displays
    # Options are TV, CRT, DFP
    option "ConnectedMonitor"    "DFP,DFP"

    # Frequencies for second monitor
    option "SecondMonitorHorizSync"    "30-107"
    option "SecondMonitorVertRefresh" "75"

    # Real modes for each display
    option "MetaModes" "1280x1024, 1280x1024; 1152x864, 1152x864; 
1024x768, 1024x768; 800x600, 800x600; 640x480, 640x480"

    # Screen layout
    option "TwinViewOrientation"    "LeftOf"


If that doesn't work, you can present the screens separately to the X 
server and combine them using the Xinerama extension.  To do this, you 
need to specify two 'Device' sections (and two Monitor sections and two 
Screen sectoins.)  The first five lines of each of the device sections 
should be something like:
Section "Device"
    Identifier    "driver0"
    Driver        "nvidia"
    BusID         "PCI:1:0:0"
    Screen        0
    option        "TwinView"        "false"
and
    Identifier    "driver1"
    Driver        "nvidia"
    BusID         "PCI:1:0:0"
    Screen        1
    option        "TwinView"        "false"