How to build WDDM driver vidpn

Discussion in 'Windows Vista Drivers' started by luodh, Jun 25, 2018.

  1. luodh

    luodh

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    I am writing WDDM filter driver for creating virtual displays.

    I support the virtual child device and video source associated paths in the DxgkDdiIsSupportedVidPn function, such as Paths(source->target):(0 <-> 0), (1 <-> 4),

    DxgkDdiEnumVidPnCofuncModality function specifies the target ID = 4, other target IDs are omitted, in Here I add source mode and target mode to this ID=4 path.

    I can see multiple monitors in Desktop Properties → Resolution, but I can't modify the resolution of the monitor and extend the desktop, this monitor Can't save display settings error?
     
    luodh, Jun 25, 2018
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  2. luodh

    jackryan84

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    The main graphics adapter must not see the additional monitor, but dxgkrnl.sys must see it and all the existing monitors of the main graphics adapter, too.
     
    jackryan84, Nov 1, 2018
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