A bit more Googling provided the answer.
There is a magic touch in Acer laptops. You have to set an administrator
password in the bios before you are allowed to disable secure boot.
I can now dual boot (using the windows boot manager). The rest should be plain
sailing now.
Cheers
Bill
-----Original message-----
> From:Eero Volotinen <eero.voloti...@iki.fi>
> Sent: Tuesday 2nd January 2018 15:21
> To: Bill Maidment <b...@maidment.me>
> Cc: SCIENTIFIC-LINUX-USERS@FNAL.GOV <SCIENTIFIC-LINUX-USERS@fnal.gov>
> Subject: RE: EFI installation of SL 7.4
>
> I have never seen hardware without possibility to disable secureboot.
>
> UBuntu works with secureboot. try it first?
>
> Eero
>
> 2.1.2018 5.20 "Bill Maidment" <b...@maidment.me <mailto:b...@maidment.me>>
> kirjoitti:<br type="attribution" />Thanks. I thought that might be the answer.
> Unfortunately, the bios (version 1.10) will not let me disable secure boot.
> Maybe an older bios will?
>
>
> -----Original message-----
> > From:Eero Volotinen <eero.voloti...@iki.fi <mailto:eero.voloti...@iki.fi>>
> > Sent: Tuesday 2nd January 2018 13:33
> > To: Bill Maidment <b...@maidment.me <mailto:b...@maidment.me>>
> > Cc: SCIENTIFIC-LINUX-USERS@FNAL.GOV
> > <mailto:SCIENTIFIC-LINUX-USERS@FNAL.GOV> <SCIENTIFIC-LINUX-USERS@fnal.gov
> > <mailto:SCIENTIFIC-LINUX-USERS@fnal.gov>>
> > Subject: Re: EFI installation of SL 7.4
> >
> > enable uefi on bios and disable secure boot.
> >
> > Eero
> >
> > 2.1.2018 4.25 "Bill Maidment" <b...@maidment.me <mailto:b...@maidment.me>
> > <mailto:b...@maidment.me <mailto:b...@maidment.me>>> kirjoitti:<br
> > type="attribution" />Happy New Year everyone.
>
> > I am now an owner of an Acer A515-51G laptop and Im trying to install SL
> > 7.4 in EFI mode dual boot with Win 10.
>
> > After lots of experiments I was only able to install in legacy mode, but
> > that locked me out of Win 10.
>
> > I am trying to run mokutil, but I get an error as follows:
>
> > mokutil --import
> > /etc/pki/secure-boot/SECURE-BOOT-KEY-fnal-sl7-exp-2020-08-26
>
> > EFI variables are not supported on this system
>
> > Elsewhere, it was suggested to do modprobe efivars, but efivars does not
> > appear to be available.
>
> > Any suggestions as to what to do next?
>
> >
>
> > Cheers
>
> > Bill Maidment
>
>
