I understand your frustration in trying to extend your display to three screens I'm greg, 10 years awarded windows mvp, specializing in installation, performance, troubleshooting and activation, here to help you If you need help setting up your external monitors, see how to use multiple monitors in windows
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If you’re having trouble setting up multiple monitors on surface, see troubleshoot connecting surface to a second screen.
One monitor is built into my laptop, one is connected via the laptop's hdmi port, and the third is connected via a usb to hdmi extender
All 3 monitors are recognized when i go into display setting, and i can see my desktop on all three monitors. On the device you’re projecting from, go to the screen mirroring settings (sometimes called cast settings), and select your pc to connect to it If you’re projecting from a pc, you can also select windows logo key + k and select the pc you’d like to connect to. Provides information on the behavior of the taskbar calendar in windows 11
When multiple monitors are part of the desktop, objects can travel seamlessly between monitors. After extending your monitor, you will notice the display settings will present additional options for working with multiple monitors To identify which monitor you are on, expand multiple displays, then click the identify button. In this case, you can enable the gpu and connect a fifth monitor to the motherboard
This may have happened, although the gpu usually only has 4 video inputs, and the lowest resolution is one of them, which is why it initially works.
