On Thu, Apr 7, 2022 at 11:09 AM Zbigniew Jędrzejewski-Szmek <
zbyszek@in.waw.pl> wrote:
On Wed, Apr 06, 2022 at 10:47:30AM -0400, Robbie Harwood wrote:
> majid hussain <mhussaincov93@gmx.com> writes:
>
> > hi,
> > could someone kindly tell me if my toshiba l750 machine has EFI support?
> > i'm blind and efi/bios screens are in accessible.
Based on a web query, it most likely has EFI support, but it also
supports BIOS-compat (CSM?).
> Easiest is probably to do:
>
> ls /sys/firmware/efi
>
> This tells you whether the machine booted using UEFI. anaconda will set
> up a UEFI-capable system if booted that way, unless partitioning is
> overridden to prevent that.
>
> If it didn't boot using UEFI today, that doesn't mean it can't (you
> could check with a live image as well). UEFI tends to be enabled on
> machines made these days by default for Windows logo requirements, but
> this is firmware land, and there are no absolutes.
Changing UEFI setting in the firmware is a big problem. We know that
a) it can only be done by tweaking settings in the firmware interface
which looks different on every machine, b) users find it very hard in
general, and c) for blind users it's virtually impossible.
So even if a machine has UEFI, if it is currently in BIOS-compat mode,
to some extent it's like if it didn't have UEFI.
Microsoft has required since Windows 8 (released in 2012) that any systems that are certified with Windows must ship with UEFI by default, so in those cases, the user would have had to manually change BIOS settings in the first place. Alternatively, the person manually chose Windows 7 instead (while that was still an option), built a system out of parts that didn't get certified for Windows (rare), or found a small vendor to sell them hardware that's not Windows certified and/or came with Linux. Having been one of the folks who started Project Sputnik, I know that Dell, which was one of the few companies shipping Linux in 2012, very quickly switched to UEFI booting for Linux because of the advantages. So I would think that the number of cases where a user doesn't know how to change to UEFI booting are limited.
Zbyszek
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