Bug#1137247: Breaks dual boot indeed my MSI Bravo 17 A4DDR

[Eric Valette]

I have updated to shim 1.48 also. When booting after upgrade I 
immediately noticed a trace in grub before the menu screen. It is so 
fast I do not manage to read it. Tried to get a photo but do not manage 
to click correctly.

For the first time, today, I tried to boot windows to get the new CA 
certificate update as BIOS is not updated. and It fails. I just have the 
menu background and nothing else.

Windows boot itself is OK : using F11 key I can select boot manager and 
boot windows correctly.

So there is a bad interaction between grub2 and shim. Below are my 
package versions:

ii  shim-helpers-amd64-signed          1+16.1+2     amd64        boot 
loader to chain-load signed boot loaders (si>
ii  shim-helpers-amd64-signed-template 16.1-2       amd64        boot 
loader to chain-load signed boot loaders (si>
ii  shim-signed:amd64                  1.50+16.1-2  amd64        Secure 
Boot chain-loading bootloader (Microsoft-s>
ii  shim-signed-common                 1.50+16.1-2  all          Secure 
Boot chain-loading bootloader (common help>
ii  shim-unsigned:amd64                16.1-2       amd64        boot 
loader to chain-load signed boot loaders und>
un  systemd-shim                       <none>       <none>       (no 
description available)

un  grub                    <none>       <none>       (no description 
available)
ii  grub-common             2.14-2       amd64        GRand Unified 
Bootloader, version 2 (dummy package)
un  grub-coreboot           <none>       <none>       (no description 
available)
un  grub-efi                <none>       <none>       (no description 
available)
ii  grub-efi-amd64          2.14-2       amd64        GRand Unified 
Bootloader, version 2 (EFI-AMD64 version)
ii  grub-efi-amd64-bin      2.14-2       amd64        GRand Unified 
Bootloader, version 2 (EFI-AMD64 modules)
ii  grub-efi-amd64-signed   1+2.14+2     amd64        GRand Unified 
Bootloader, version 2 (amd64 UEFI signed by De>
ii  grub-efi-amd64-unsigned 2.14-2       amd64        GRand Unified 
Bootloader, version 2 (EFI-AMD64 images)
un  grub-efi-ia32           <none>       <none>       (no description 
available)
un  grub-emu                <none>       <none>       (no description 
available)
un  grub-ieee1275           <none>       <none>       (no description 
available)
un  grub-legacy             <none>       <none>       (no description 
available)
in  grub-pc                 <none>       amd64        (no description 
available)
ii  grub-pc-bin             2.14-2       amd64        GRand Unified 
Bootloader, version 2 (PC/BIOS modules)
un  grub-xen                <none>       <none>       (no description 
available)
un  grub2                   <none>       <none>       (no description 
available)
ii  grub2-common            2.14-2       amd64        GRand Unified 
Bootloader (common files for version 2)

--
Eric Valette