Bug#988392: Impossible to install grub-pc and grub-efi-amd64 in parallel

[Paul Menzel]

Dear Colin,


Am 11.05.21 um 23:37 schrieb Colin Watson:
> On Tue, May 11, 2021 at 09:19:28PM +0200, Paul Menzel wrote:
>> I have a Debian installation on a disk, I carry around, and I want to boot
>> on BIOS and (U)EFI systems. This would be possible with the switch
>> `--target`.
>>
>>      sudo grub-install --target=i386-pc --boot-directory=/boot /dev/sda
>>
>> and
>>
>>      sudo grub-install --target=x86_64-efi /dev/sda
>>
>> Unfortunately I am unable to install both packages in parallel as they
>> conflict (Replaces?) with each other.
>>
>>      $ apt show grub-pc
>>      […]
>>      Replaces: grub, grub-common (<= 1.97~beta2-1), grub-coreboot, grub-efi-amd64, grub-efi-ia32, grub-ieee1275, grub-legacy, grub2 (<< 2.04-18)
> 
> The purpose of grub-pc and grub-efi-amd64 is to own the system's boot
> process, and so only one of those may be installed at once; those
> Conflicts are deliberate.  However, to support your use case, you can
> install grub-pc-bin and grub-efi-amd64-bin in parallel, and doing so
> gives you enough to be able to run the grub-install commands you're
> asking for.

As always thank you very much for the fast and helpful reply with the 
solution. Sorry for not thinking of that myself.


Kind regards,

Paul