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Re: Secure Boot won't let boot into Debian

rodolfo.medina@xxxxxxxxx wrote:
>Steve McIntyre <steve@xxxxxxxxxx> writes:
>> rodolfo.medina@xxxxxxxxx wrote:
>>>Hi all.
>>>I frehly installed Debian Sid in dual boot with Windows 10 on my brand new
>>>Lenovo desktop pc but it won't boot into Debian system I suspect because of
>>>the new Secure Boot policy.  I want to disable it but the problem is that
>>>there's no Secure Boot option anywhere in its Bios.  In fact, in the Security
>>>submenu, there are only the options for administrator and power-on password
>>>What do you suggest me to do?
>> Are you totally sure it's a Secure Boot issue?
>> What exactly happens at boot? Does it just boot straight into the Windows
>> installation?
>It does.
>> Have you managed to install Debian
>I did.
>> , or will it just not boot the installer?
>It did boot it and the installation went - apparently - all right.

Right, OK. Did the installer say it was booting in UEFI mode? It says
so prominently on the first bootloader screen. If so, then you clearly
don't have a Secure Boot problem if the installer worked.

Alternatively, you may have booted the installer in BIOS/CSM mode, in
which case it might install but fail to install a boot loader at the
end of the process. *Or* you have installed in UEFI mode, but the
firmware on your computer is just ignoring the Debian-installed boot
option. That's always possible on some bad UEFI implementations,

>> If you go into the BIOS/firmware config program, does that show you a
>> list of boot options including Windows?
>What do you mean by BIOS/firmware config program?  I wouldn't know...

The BIOS setup menus, if that's clearer. 

Another option would be to boot the installer again in rescue mode and
have a look at what partitions you have, and what bootloader(s) you
can find on /boot/efi for a UEFI system.

Steve McIntyre, Cambridge, UK.                                steve@xxxxxxxxxx
< sladen> I actually stayed in a hotel and arrived to find a post-it
          note stuck to the mini-bar saying "Paul: This fridge and
          fittings are the correct way around and do not need altering"