How to understand why the old monitor does not connect to the new laptop and fix it?

Question

Windows

There is a laptop with windows 10 on board and hdmi video output.
I have an old widescreen monitor. To connect to it, I use an hdmi-vga adapter.
If I boot in the traditional way, the monitor displays the logo, shows the BIOS if desired, but then falls off with an error that the video format is not supported.
If I boot in safe mode everything is fine. In ntbtlog.txt, all lines are without errors.
I see the problem in some graphic service that is loaded in the normal mode. How to find and disable it?

Answer 1

I think it's enough to set the correct resolution that both the adapter and the monitor support.

Answer 2

In safe mode, only the most necessary drivers are left, the rest are disabled. Including a regular video driver - instead of it, a standard one from MS is taken at a resolution of 1024x768x60 Hz, since almost all video adapters and screens understand it (you saw this).
To find out what is the limit for this video->hdmi->vga chain of yours, go through the entire list of resolutions, starting at 1024x60 Hz, and increasing. Before that, you can disable the "Hide modes that the monitor cannot use" option in the display properties, if it was enabled.
You can try to exclude the vga element from the chain by finding a monitor with an hdmi input. It is undesirable to use a TV set, since it has a much smaller list of resolutions accepted by it than computer monitors.