On Wed, Feb 18, 2026 at 10:41:39PM -1000, Joel Roth via Dng wrote:
> On Wed, Feb 18, 2026 at 05:01:54PM +1100, Ralph Ronnquist via Dng wrote:
> > On Tue, Feb 17, 2026 at 07:03:05PM -1000, Joel Roth via Dng wrote:
> > >
> > > On Fri, Jan 30, 2026, Joel Roth via Dng wrote:
> > > ...
> > > Short story. I could not get the cloned partition to boot! I
> > > upgraded my daedalus and ran grub-install, confused about
> > > which grub I had. Last try was definitely grub 2, okay, but
> > > the i386-pc flavor. Is that used for an amd64 system?
> >
> > No, you need to install and use grub-efi-amd64 to boot UEFI bios.
>
> Now I understand that i386-pc grub-install would not write to
> a disk with a GPT partition table and EFI partition.
>
> Installing grub-efi-amd64 isn't going to clobber
> anything without my commanding it? That is, except for
> replacing grub-pc, correct?
>
> I should be able to resolve booting problems, but I do want
> a USB utility that will boot linux partitions whether MBR or
> GPT/EFI is used.

Yes, though it's the system itself that has its bios; maybe both
legacy bios and UEFI bios, or maybe just one of them. Then that bios
determines which partition table type one may use, either both the old
DOS type and the newer GPT type, or maybe just one of them.

And next, it's the bios that determines whether or not a USB is
bootable, and especially whether either or both of legacy boot and
UEFI boot is possible, from the USB.

Any one system is particular in its setup, while the collective of all
or most systems bring the cross product of possibilites.

Anyhow, installing grub-efi-amd64 only brings the UEFI boot loader,
which essentially just chain loads a "normal" grub boot.

Ralph.

>
> > If you can and want to use legacy bios, then you need grub-pc instead.
>
>
> --
> Joel Roth
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