I'm having some trouble in dual boot between Ubuntu and Windows 10.
I've installed Ubuntu in the same disk but using a shrinked partition.
The problem is: My windows (or motherboard, I don't know) is using UEFI mode and there's no option to change this to legacy mode in my bios.
I can select between O.S selecting boot from "Windows boot manager" for Windows, or simple selecting the disk to boot by Ubuntu.
Is there something that I can do to boot by GRUB or something else that I don't need to change "boot disk" every time that I want to change my O.S?
Thank you for your attention.
OBS: I tried to install grub by grub-install or using boot-repair live cd but no success.
Edit: I've installed ubuntu using the partition edit option, because the "install alongside" option didn't appear for me. So I didn't know if grub is already installed or no.
I though that changing to legacy mode, reinstalling ubuntu, the dual boot will work with no issues.