DisplayMonitor::FromIdAsync() failure

test_display_monitor.cpp

#pragma comment(lib, "windowsapp")

#include <cstdio>

#include "winrt/base.h"
#include "winrt/Windows.Devices.Enumeration.h"
#include "winrt/Windows.Devices.Display.h"

using namespace std;
using namespace winrt;

using namespace Windows::Devices::Enumeration;


int main()
{
    init_apartment();

    using namespace Windows::Devices::Display;

    const auto monitorSelector = DisplayMonitor::GetDeviceSelector();

    const auto devices = DeviceInformation::FindAllAsync(monitorSelector).get();

    for (const auto& device : devices) {
        const auto id = device.Id();

        printf("id=%ls\n", id.c_str());

        DisplayMonitor monitor(nullptr);

        try {
            monitor = DisplayMonitor::FromIdAsync(id).get();
        }
        catch (...) {
            printf("  exception!\n");
        }

        if (!monitor)
            continue;

        printf("  DisplayName = %ls\n", monitor.DisplayName().c_str());
    }
}

DeviceInformation::FindAllAsync() finds two monitors:

id=\\?\DISPLAY#DELA0A3#4&27e3cd2c&0&UID53349120#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}
id=\\?\DISPLAY#DELA0A3#4&27e3cd2c&0&UID51249920#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}

DisplayMonitor::FromIdAsync() always throws exception ERROR_FILE_NOT_FOUND.

BTW creating instance with DisplayMonitor::FromInterfaceIdAsync(interfaceId) works fine. But then you have to resort to win32 EnumDisplayDevices() function to obtain interfaceId.

Display adapter 0:
  DeviceName = \\.\DISPLAY1
  DeviceString = Intel(R) HD Graphics
  StateFlags = 0x00000005
  DeviceId =
  DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{0C0D3190-4DE2-11E8-9D24-00249B13949F}\0000
  Display monitor 0:
    DeviceName = \\.\DISPLAY1\Monitor0
    DeviceString = Generic PnP Monitor
    StateFlags = 0x00000003
    DeviceId = MONITOR\DELA0A3\{4d36e96e-e325-11ce-bfc1-08002be10318}\0001
    DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0001
    DeviceId[DEVICE_INTERFACE_NAME] = \\?\DISPLAY#DELA0A3#4&27e3cd2c&0&UID51249920#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}
Display adapter 1:
  DeviceName = \\.\DISPLAY2
  DeviceString = Intel(R) HD Graphics
  StateFlags = 0x00000001
  DeviceId =
  DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Video\{0C0D3190-4DE2-11E8-9D24-00249B13949F}\0001
  Display monitor 0:
    DeviceName = \\.\DISPLAY2\Monitor0
    DeviceString = Generic PnP Monitor
    StateFlags = 0x00000003
    DeviceId = MONITOR\DELA0A3\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
    DeviceKey = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
    DeviceId[DEVICE_INTERFACE_NAME] = \\?\DISPLAY#DELA0A3#4&27e3cd2c&0&UID53349120#{e6f07b5f-ee97-4a90-b076-33f57bf4eaa7}