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Re: Grub2 chainloader bootmgfw.efi not working

From: Andrei Borzenkov
Subject: Re: Grub2 chainloader bootmgfw.efi not working
Date: Mon, 14 Sep 2015 15:11:31 +0300

On Mon, Sep 14, 2015 at 2:36 PM, Vyacheslav Gonakhchyan
<address@hidden> wrote:
> Hi, everyone!
> I have dual boot config Archlinux/Windows7 and latest packages. I am booted
> into grub rescue mode. Or use command line. I want to tell Grub2 to load
> Windows Boot Loader bootmgfw.efi. Basically grub2 refuses to do it with
> error "invalid root device".
> Steps to reproduce:
>> set root=(hd1,gpt7)
>> chainloader /EFI/Microsoft/Boot/bootmgfw.efi
> Screen is flashing with "invalid root device".

Is your grub BIOS or EFI? What are values for grub_cpu and grub_platform?

echo $grub_cpu $grub_platform

> So grub2 finds bootmgfw.efi but cannot give it control. I tried every other
> hd1,gpt combination to no avail.  I also tried setting root to one device
> and loading bootmgfw.efi from another device(hd1,gpt7).
> It's strange because I can load this file from shell (shellx64.efi) within
> UEFI BIOS without error. Any advice is appreciated.
> Regards,
> Viacheslav
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