Re: Failed Debian 12 install, need help with boot loader re-install

[Jeffrey Walton <noloader@gmail.com>]

On Mon, Nov 4, 2024 at 9:22 AM Chris Green <cl@isbd.net> wrote:
>
> On Mon, Nov 04, 2024 at 11:10:03AM +0000, Chris Green wrote:
> > On Mon, Nov 04, 2024 at 05:34:49AM -0500, Felix Miata wrote:
> > >
> > > It's usually a good idea to disable CSM support (legacy/MBR booting), by whatever
> > > term your particular UEFI BIOS labels it.
> > >
> > The BIOS has "CSM Configuration", if I go into that I'm offered:-
> >
> >     Launch CSM
> >     Boot option filter
> >     Launch PXE OpROM Policy
> >
> > If I disable "Launch CSM" then the other options disappear.  With
> > "Launch CSM" disabled when I reboot the system it just drops me into
> > the BIOS diagnostic program and I can get no further.
> >
> > Similarly if I enable "Launch CSM" and set the "Boot option filter" to
> > "UEFI only" then on reboot I simply end up in the BIOS diagnostic
> > program again.
> >
> > Maybe I should try installing from scratch again with "Launch CSM"
> > disabled?  (I'm glad this is a fairly fast system!)
> >
> ... and if "Launch CSM" is disabled then when I boot from the Debain
> 12 USB stick I just get dropped into the grub menu and I can't do an
> install.

I've come across an Acer system that requires a BIOS password to
unlock more BIOS menus and functionality. The BIOS password unlocked
additional menus to change disk protocols and boot devices. After
adding a password, I was able to switch to UEFI boot and enable
SecureBoot.

You might try to add a password to see if it unlocks additional menus for you.

Jeff