Hello Dmitry,
For the second, please use the Windows 10 Feedback Hub and request that Microsoft does NOT use the integrated GPU but the best GPU for indirect displays.
This is an operating system feature since Windows 10 Anniversary Update.
Microsoft understandably indicated that, unless their customers show interest in this, they will not prioritise the development work necessary.
Today, Windows 10 will use the graphics card used for boot.
The workaround is to disable the Intel graphics card, but most laptops don't allow this. To know if your particular machine allows this, you would need to ask your laptop vendor how. It would need to be in the BIOS. Once the computer has booted, it is far too late to disable the low end graphics card.
Kind regards,
Alban
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