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Some monitors might have problems with incorrect timing. (I don't want to describe how CRT and LCD monitors work, etc. See Wikipedia pages or OSDev for that.) Some monitors, both CRT and LCD, according to OSDev Wiki page (the big bold red warning at the top of the page) can have problems with wrong timing information and disconnecting the VGA connector can ...


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You could find the number of monitors and used lanes by using the free TechPowerUp GPU-Z. Under the Advanced tab, you will find the monitors and the number of lanes taken by each one. From this data you may find the number of DisplayPort signals taken off the bus:


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The Intel HD Graphics 4600 can in theory support three monitors (link). However, this requires more graphical ports than are available in your notebook. Also, this being a notebook, it's not possible to add in a new graphic card that supports DisplayPort. I think you will need to settle for two monitors, connected to your two ports.


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The voltage is dipping when your air conditioner kicks in. This will happen if your PC and/or AC is a long distance from your breaker panel AND they are on the same circuit. On start up, the AC is drawing more current which means the voltage drop to the wire or I2R losses goes up decreasing voltage at load and hence the monitor shuts down. From ...


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Answers are in the comments really (thanks Mokubai and Tonny) but here's a summary: Install drivers for display (not sure if this did anything as I had to do #2 as well, which I did after this). Connect monitor using DisplayPort. HDMI didn't work. My PC doesn't have video over USB-C so haven't tried it. I couldn't find any documentation on this regarding ...


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Multiple Monitors program does what you want, although it's not free. It has a free trial to check it out. I tested it with 2 monitors. Going right from right one does send you to the left one like in PacMan, but going up or down only sends you in the same monitor, not the other one (which would me a bit disorienting in my opinion).


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System Prefs > Mission Control Switch on 'Displays have separate Spaces' It may not be quite what you want but it's the 'cure' for what you asked;) Personally, I consider it one of the very many reasons to never use fullscreen.


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With DisplayPort over USB-C, there is an important limitation to be aware of. Unlike with Thunderbolt, the USB and DisplayPort signals are not muxed and each requires dedicated wires. This means the following configurations are possible: 1 DP Lane + SuperSpeed USB 2 DP Lanes + SuperSpeed USB 4 DP Lanes + High Speed USB In many adapters/hubs/docks, you don’...


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