How to create more than one monitor with a non-standard resolution. about screenexpander HOT 7 CLOSED

1. See umdf2/pch.h. For further information, see iddcx.h
2. No. The new monitor is enumerated by Windows after we call the API which reports the arrival of a new monitor.

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I thank you for your reply.
Now, It works on my setup!
I have another question for you.

I saw the multi-monitor is supported in Screen Adapter class and Monitor Class (and ioControl).
But when I try to create more than a monitor, it does not work.
The error is "Error value: 1117 Message: The request could not be performed because of an I/O device error".

Do you have any suggestions about this error?

Because I know, the C# client application and the PIPE server do not support multi-monitor.
Thus, I've expected an error in another region of the code not during the creation of a new monitor.

Thanks for your time.

[UPDATE]

The error comes out during the IndirectAdapter::NewMonitorArrives method,
precisely when IddCxMonitorArrival is called.
So, I wrote another pipe server in order to send a sequence of logs.
I got the output of this problem:

1. First monitor:
   IddCxMonitorArrival success, id:0 < FIRST MONITOR
2. Second monitor:
   IddCxMonitorArrival Failed, Error: -1073741811
An invalid parameter was passed to a service or function. (NTSTATUS)

I'm moving on, to aims to investigate why this happens!
Anyway, do you have a suggestion? Could it be the wrong adapter's parameter?

Again, thanks for your time, you are very kind.

[UPDATE]

I solved this issue, the IDDCX_MONITOR_INFO's id must to be different for each monitor.

Anyway, thank you for your support.
Bye.

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The architecture of this program supports multi-monitor feature but it hasn't been implemented yet. I can't spare time for it right now.

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Hi,

how could I create a monitor with a completely non-standard resolution (for example, 2000px X 1000px) without passing an EDID?

What should I do?

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Regarding the "strange" resolutions,
I create a monitor without the EDID, and then
I pass the following display configuration when IddMonitorGetDefaultModes is called :

DISPLAYCONFIG_VIDEO_SIGNAL_INFO foo[]=
        {
              148500 * KHZ,
            { 148500 * KHZ, 1920 + 280},
            { 148500 * KHZ, (1920 + 280) * (1080 + 45)},
            { WIDTH, HEIGHT },   //  <- **Active Size**
            { 1920 + 280, 1080 + 45},
            { {255, 0} },
            DISPLAYCONFIG_SCANLINE_ORDERING_PROGRESSIVE
        },

Moreover, since the resolution is an "intersection" among display mode and target mode,
I return a "compatible" target mode configuration:

IddMonitorQueryModes(...) {
    CreateTargetMode(TargetModes[0], 
               1920, 1080, 
               WIDTH, HEIGHT,   //  <- **Active Size**
               60
       );
}

There are 2 issues in this approach:

1. I can't create a display with a resolution bigger than 1920x1080,
2. just resolutions like 1024x720, 960x540, 800x600 are accepted (i.e. in the other cases, the SwapChain context is not created).

So, exists a table or a function which can generate an appropriated display configuration?

Generally speaking, based on your knowledge, is the modification of the active size attribute the right way to create a monitor with a strange resolution?

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Hi,

how could I create a monitor with a completely non-standard resolution (for example, 2000px X 1000px) without passing an EDID?

What should I do?

I would suggest writing an EDID generator on your own.

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Solved privately.

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