Re: problems dual booting Ubuntu 16.04 and Windows 10

[Pascal Hambourg]

Le 12/05/2018 à 06:34, David Collier a écrit :
> >   From there, install GRUB EFI :
> >
> > grub-install --target=x86_64-efi --bootloader-id=Ubuntu
> this is where it fails, it complaints that
> /usr/local/lib/grub/x86_64_efi/modinfo.sh does not exist. And indeed it
> does not, it looks like I have /usr/local/lib/grub/i386-pc, but if I use
> i386-pc in the command line it prints
>
> grub-install: error: install device isn't specified

You don't want i386-pc. This installs GRUB for BIOS.

You wrote that you built and installed GRUB from the source tarball 
instead of the distribution packages. Maybe you didn't build the EFI 
targets, and it is better to stick with the distribution packages. The 
one you need first is grub-efi-amd64-bin. It won't run grub-install 
automatically. After all is fine, you can install grub-efi-amd64 which 
replaces grub-pc and runs grub-install automatically.

Make sure you run grub-install from the distribution, not the one you 
built from source.