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#1
I have HDMI- DVI and VGA-HDMI. I tried that, two or three times, but no success.
Hmmm...,
Check this out...
Windows 10 - Change Display Numbers / Identity
I tried it and it didn't work. If there is no workaround I'll just keep them as they are.
Is this AMD or Nvidia for the graphics cards?
This is surely down to the maximum refresh rate of the primary screen set at a certain resolution.
So if screen 1 is actually the secondary screen you need to find out what refresh rate its booting at comparing that with your main screen. If the 2nd screen has a lower refresh rate compared to the first, it will always boot first, as its slower. If it was the other way round, you wouldnt be able to see either upon boot up. Think of it like Fat32 and NTFS
I would disable your main screen and concentrate on other screen. Go through every single resolution it can handle and match it to the ability of your main screen, if you see what i mean. Stock driver settings dont seem to be able to max out the horizontal and vertical lines for maximum performance, god knows why.
Seems default driver setups like this will be a complete mess and mismatch for dual screens with zero monitor support by default, thanks developers