How to setup GRUB boot?

Question

linux

There is an ssd that already has windows 10 on it, I want to put Ubuntu 20.04.2.0 LTS on it. I put through manual markup on the same ssd.
The problem is related to the choice of device for installing the bootloader.
Tried two options:
1. Specified a place with Windows boot manager.
2. I pointed out the ssd itself.
With both options, Windows 10 starts by default. At the same time, only ssd with a note in brackets: "(Windows Boot Manager)" can be installed in the BIOS. But if you press F11 during boot, then there will be two systems in the selection window (Windwos (ssd....) ,ubuntu(ssd....) ).
Tell me what needs to be done so that GRUB starts with ubuntu by default

Answer 1

The issue was resolved)
Because I had an old UEFI (from msi), in which the function of setting the priority of bootloaders was simply cut (as I understand it) => the windows bootloader was selected by default ("due to security reasons" - it was written on many forums, but I'm still not sure that this information is true).
It was necessary to install the BIOS, in which everything was clear and convenient. All functions were in place and the boot priority of the disk loaders changed without much effort. Linux was put in the first place => GRUB was launched, and then along the knurled one.
I hope this solution will help someone)

Answer 2

you need to google towards repair grub or dual boot ubuntu windows, they usually describe ways to solve this problem.

Answer 3

google in the direction of "set a rough default startup system / sequence of operating systems".
he just takes the "first in the list" and comes across Windows :)
it's also worth looking to see which MBR or UEFI bootloader. rude can render and not guilty.