Re: problems dual booting Ubuntu 16.04 and Windows 10

[Pascal Hambourg]

Le 13/05/2018 à 20:26, David Collier a écrit :
> On Sun, May 13, 2018 at 12:40 AM Pascal Hambourg <address@hidden>
> wrote:
>
> > Uninstall grub-legacy and check that you have at least grub2-common and
> > grub-efi-amd64-bin installed. Or just install grub-efi-amd64.
> > After EFI boot, run os-prober to check that Windows is detected.
> > Run update-grub to include it in GRUB's menu.
>
>
> I think I followed your instructions closer this time, here is what i get
> inside chroot:
>
> vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
> address@hidden:/# dpkg -l  | grep grub
> rc  grub                                       0.97-29ubuntu68
>                  amd64        GRand Unified Bootloader (Legacy version)
> ii  grub-common                                2.02~beta2-36ubuntu3.17
>                  amd64        GRand Unified Bootloader (common files)
> ii  grub-efi-amd64                             2.02~beta2-36ubuntu3.17
>                  amd64        GRand Unified Bootloader, version 2 (EFI-AMD64
> version)
> ii  grub-efi-amd64-bin                         2.02~beta2-36ubuntu3.17
>                  amd64        GRand Unified Bootloader, version 2 (EFI-AMD64
> binaries)
> rc  grub-pc                                    2.02~beta2-36ubuntu3.17
>                  amd64        GRand Unified Bootloader, version 2 (PC/BIOS
> version)
> ii  grub2-common                               2.02~beta2-36ubuntu3.17
>                  amd64        GRand Unified Bootloader (common files for
> version 2)

Good.

> address@hidden:/# os-prober
> /dev/sdc2@/efi/Microsoft/Boot/bootmgfw.efi:Windows Boot Manager:Windows:efi

Good.

> /dev/sde1:unknown Linux distribution:Linux:linux

What is /dev/sde1 ? The live USB ?

> grub-probe: error: cannot find a GRUB drive for /dev/sdf1.  Check your
> device.map.

What is /dev/sdf ?

> address@hidden:/# update-grub
> Generating grub configuration file ...
> Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT
> is set is no longer supported.
> Found linux image: /boot/vmlinuz-4.13.0-41-generic
> Found initrd image: /boot/initrd.img-4.13.0-41-generic
> Found linux image: /boot/vmlinuz-4.13.0-39-generic
> Found initrd image: /boot/initrd.img-4.13.0-39-generic
> Found linux image: /boot/vmlinuz-4.13.0-38-generic
> Found initrd image: /boot/initrd.img-4.13.0-38-generic
> done

I do not see the other systems detected by os-prober.
Check the options in /etc/default/grub.

> note the error reported by os-prober. Now there is no grub menu at all
> during boot, the machine boots directly into Ubuntu (was I supposed to run
> grub-mkconfig at some point)?

No, update-grub calls grub-mkconfig.

> (Also, in the command line grub now shows two partitions instead of one,
> but my experiments with chainloading Windows all failed.)

Can you elaborate ?