Re: 'error: invalid signature' when booting Windows 10

[David Collier]

On Mon, Dec 10, 2018 at 2:36 PM Pascal Hambourg <address@hidden>
wrote:

> Le 10/12/2018 à 22:59, David Collier a écrit :
> > I copied the script below to the SSD /etc/grub.d  directory and ran
> > update-grub, and verified that the menu shown when booting comes from
> this
> > grub instance.
>
> This is not what I am asking for. What about the GRUB bootloader itself
> (boot image and core image) ? Did you run grub-install ?
>

ah, no, I did not, will try tonight.


> >> For now, the only explanation which comes to my mind is that the active
> >> GRUB is not GRUB EFI but GRUB BIOS, which expects to chainload a boot
> >> sector with AA55 signature instead of an EFI executable.
> >
> > is there any way around this?
>
> First, check what GRUB flavour is running.
> Type "c" at the GRUB menu to enter GRUB shell and type "set" to print
> environment variables. One contains the target architecture efi or pc.


will do and report here, thank you for your help,

-dc


>
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