On 22/08/2024 16:44, Felix Miata wrote:
That is written by any process that
reads GRUB_DISTRIBUTOR= to determine where to do its writing on the ESP.
To avoid confusion of those who may notice this thread in search engine
results:
In Debian GRUB_DISTRIBUTOR value is *not* passed to "grub-install
--bootloader-id" by postinst package scripts:
<https://sources.debian.org/src/grub2/2.12-5/debian/postinst.in/?hl=723#L723>
<https://sources.debian.org/src/shim-signed/1.44/debian/shim-signed.postinst/?hl=64#L64>
Notice
case $bootloader_id in
kubuntu) bootloader_id=ubuntu ;;
esac
that was added to prevent a secure boot issue.
Behavior of SUSE may be different.
I believe, a robust way would be to add grub-install option that reports
path withing EFI partition configured at compile time, so heuristics
based on GRUB_DISTRIBUTOR from /etc/default/grub would not confuse users.
*Signed* grub*.efi reads its config from EFI/debian/grub.cfg (that loads
/boot/grub/grub.cfg) that is fixed when the binary is signed.
