I just updated to Windows 10 and discovered that Microsoft broke this method of adding a fake second monitor: Is there a way to fake a dual (second) monitor which I rely on for scaling some small programs to full screen with OBS. The "Detect" button in Control Panel seems to do nothing, and the "Detect" button in Settings simply says a display was not connected.
Is there any way to force Windows 10 to think there's a display connected on VGA without extra hardware or paid software? I'm using a laptop with an NVIDIA 970M with HDMI, VGA, and DisplayPort out.
What I've tried:
- The "My display is not shown..." option in the NVIDIA Control Panel, which won't let me add anything and only has options for televisions
- SpaceDesk, which almost works except that my real display is bumped to #2, and requires a client to be connected
- DemoForge Mirage/ZoneScreen, which also require a connected client and are somewhat unstable on recent versions of Windows
- VirtualMonitor which I think is almost what I want, but isn't compatible with Windows >7 and has some compatibility issues (?)
Note that I am not looking for Virtual Desktop software, and I don't need anything as fancy as Matrox PowerDesk or Virtual Display Manager.
Answer
This is by far not the ideal solution, but for now it will do: I put a 102 Ohm resistor across pins 2 and 7 of my VGA port (also known as the headless Mac Mini trick), and Windows 10 now believes I have a second monitor attached.
On a different computer I had to use pins 1 and 6 and reboot before the "monitor" would work.
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