[bug#45225] [PATCH] gnu: grub: Fix unicode font loading when booting over TFTP.

[Ludovic Courtès]

Hi Stefan,

Stefan <stefan-guix@vodafonemail.de> skribis:

> Due to this, there is somewhere a 
> /volume/systems/guix-system/gnu/store/…-bootloader-profile/share/grub/unicode.pf2,
>  which is an *absolute* symlink to 
> /gnu/store/…-grub-efi-2.04/share/grub/unicode.pf2. 
>
> The generated grub.cfg now normally refers to 
> /gnu/store/…-bootloader-profile/share/grub/unicode.pf2.
>
> When GRUB tries to load gnu/store/…-bootloader-profile/share/grub/unicode.pf2 
> via TFTP, due to a profile prepared *relative* symlink at 
> /volume/systems/guix-system/boot/gnu/store to the real store location at 
> ../..gnu/store/guix-system/gnu/store/ the TFTP server is able to access 
> gnu/store/…-bootloader-profile/share/grub/unicode.pf2.
>
> And there is the problem: That 
> /gnu/store/…-bootloader-profile/share/grub/unicode.pf2 is an *absolute* 
> symlink with no meaning to the TFTP server, so loading the font fails.
>
> Simply speaking: Files for booting via TFTP must not be *absolute* symlinks.

It’s possible to create profiles that use relative symlinks:

  (profile-derivation … #:relative-symlinks? #t)

or, for the declarative counterpart:

  (profile (content …)
           (relative-symlinks? #t))

Would that solve your problem?

BTW, I don’t see “bootloader-profile” in ‘master’; is it on a branch?

Thanks,
Ludo’.