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#5819: UEFI support
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Reporter: zeckma | Owner: lfs-book
Type: enhancement | Status: new
Priority: normal | Milestone: 12.5
Component: Book | Version: git
Severity: normal | Keywords:
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We tell users to go to BLFS to build and setup GRUB for UEFI boot support.
The issue with this is that most systems nowadays use UEFI booting, and a
lot don't even have a legacy boot option available. Being told to go to
another book for this is clumsy, and also requires the user to find a way
to get the packages from BLFS. Some users are led to believe that they
have to install more than 5 packages just for UEFI support. They are also
told pretty late in the process, instead of being told upfront during the
partitioning stage the situation regarding BIOS and UEFI.
This has been a long standing issue and I think it's time we work
something out here. There already has been some work in branches me and
xry111 created. I worked mainly on documentation, while xry111 worked on
instructions. This was done in early 12.4. Fundamentally, the issue is
simple. We don't need FreeType2 or efibootmgr at all. All that's needed is
to build GRUB as shown in BLFS, which only adds the `--with-platform=efi`
and `--target=x86_64` parameters, and do a normal install from there. For
doing `grub-install`, just add the `--removable` flag so that the EFI file
gets put in a hardcoded location, skipping the need for efibootmgr. We
should still keep efibootmgr in BLFS to better handle EFI entries if
needed.
This has been known about for a little while now. There is an issue
though, regarding `--target=x86_64` specifically, and handling different
architectures. Most solutions would look fine when rendered, for humans to
read. But jhalfs would break as it wouldn't reconcile with which
instructions to actually run. We have to find a way to create XML that
doesn't break jhalfs, or alter jhalfs somehow to reconcile.
It's been a while since this issue was being worked on, xry111 knew most
about this issue. So for further info, it'd be good for him to better shed
light on the issue.
Ideally, I want this coming in at 12.5. This was planned before 12.4, but
the issue stopped us from working on it.
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Ticket URL: <https://wiki.linuxfromscratch.org/lfs/ticket/5819>
LFS Trac <https://wiki.linuxfromscratch.org/lfs/>
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