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

From: David Collier
Subject: Re: 'error: invalid signature' when booting Windows 10
Date: Thu, 13 Dec 2018 22:51:45 -0800

On Thu, Dec 13, 2018 at 10:35 PM Pascal Hambourg <address@hidden>

> Le 14/12/2018 à 06:13, David Collier a écrit :
> > when I try booting from the usb stick it indeed shows two boot options,
> > 'Patriot Memory PMAP' and 'UEFI: Patriot  Memory PMAP' but when I try
> > picking the UEFI option it fails with message
> >
> > error: file '/boot' not found
> Is this a GRUB error ? Does it fallback to a grub rescue prompt ? If
> yes, what do the 'set' and 'ls' commands display ?

ah, it turns out it is. set shows a screenful of variables, in particular


ls shows a bunch of drives, some with partitions, some without.

> however, if I boot from this stick in non UEFI mode I see that it has two
> > partitions, and both of them have /boot directory.
> >
> > Any idea what could be wrong? Some search suggests that it could be due
> to
> > the fact that I copied the .iso image to the stick using dd, is this the
> > case?
> What ISO image is it ?

The one I downloaded from the Debian Mint page

> dd to /dev/sdX is the proper way to write the image if it is a
> ISO-hybrid image.
> Instead of using an ISO image on the stick, you could also create a DOS
> or GPT partition table, an EFI partition (FAT) and a Linux partition
> (ext2 or ext4), mount the EFI partition on /boot/efi and the Linux
> partition on /boot/grub and run
> grub-install --removable
> update-grub
> Then reboot and select the USB stick for boot in UEFI mode.

I'll try this on the weekend.

thank you again,

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