Re: problem installing trixie - no EFI

[Flo <debianflo@gmx.at>]

On 7/17/25 13:29, Andy Smith wrote:
> Hi,
>
> On Thu, Jul 17, 2025 at 12:42:29PM +0200, Flo wrote:
> > For me it looks like that the installer thinks that I am on a non EFI
> > system?
> >
> > Any ideas?
>
> Yes, it isn't actually booting in EFI mode. I don't think this will be
> an issue with Debian because by the time the Debian installer runs the
> system has already decided whether it is booting UEFI or legacy BIOS.
>
> Possibly I could be wrong about that, in that possibly your
> motherboard's firmware doesn't see the install media as EFI bpptable so
> is falling back to legacy BIOS.
>
> I think I'd have another go looking through the BIOS settings to ensure
> there's no way it is set to legacy booting or fallback to legacy
> booting.

My BIOS settings only say UEFI is enabled. And that drives over 2TB 
can't be booted in legacy mode. Mine is 3TB.

I'm missing a EFI partition. The installer doesn't create one. In 
earlier times it did (on this computer and on my laptop as well). And I 
can't create it manually. I can only create a FAT32 partition, 
/boot/efi, which stays empty while installing.

Is it possible that my motherboard can find this disk to be bootable 
without a proper efi partition?

Flo