Re: UEFI multiboot
Max Nikulin composed on 2024-08-22 10:17 (UTC+0700):
> Felix Miata wrote:
>> My BBS menu contains 4 entries corresponding to output from efibootmgr,
>> with the highlight on the one beginning "opensusetw", as configured via
>> GRUB_DISTRIBUTOR=.
> Or it just coincides with the configured value.
/etc/default/grub's GRUB_DISTRIBUTOR=, if not null, /is/ where the configuration
is established. In openSUSE, that default is null, and thus falls back to
something somewhere I suppose in /usr/ establishing opensuse as its default. In
Debian it is by default whatever `lsb_release -i -s 2> /dev/null || echo Debian`
works out to be, usually "debian" AFAICT, unless it's been changed since last I
had such file from a Debian installation. With only one bootloader per PC, lots of
/etc/default/ directories have no grub file in them.
> My expectation is that
> EFI/opensusetw/grub.cfg is still hardcoded in your grubx64.efi.
Given /boot/grub2/grub.cfg was last written 13 minutes after
EFI/opensusetw/grubx64.efi, I do not believe it is in there in this or on any
other of my installations:
# ls -gG /boot/efi/EFI/opensusetw/grub.cfg
ls: cannot access '/boot/efi/EFI/opensusetw/grub.cfg': No such file or directory
# ls -gG /boot/efi/EFI/opensusetw/
total 148
-rwxr-xr-x 1 151552 Aug 21 16:08 grubx64.efi
# ls -gG /boot/efi/EFI/*
/boot/efi/EFI/BOOT:
total 1172
-rwxr-xr-x 1 143360 Aug 23 2022 BOOTX64.EFI
-r-xr-xr-x 1 1053552 Jul 26 2017 mt74x64.efi
/boot/efi/EFI/opensusetw:
total 148
-rwxr-xr-x 1 151552 Aug 21 16:08 grubx64.efi
# lsblk -f | egrep -i 'tw|deb|esp'
├─sda1 vfat FAT32 TG1P01ESP ...9-E... 315M 1% /boot/efi
├─sda7 ext4 1.0 tg1p07stw c9b0...701a 1.1G 81% /
├─sda9 ext4 1.0 tg1p09deb12 87b9...8adc 1.5G 76% /disks/deb12
├─sda13 ext4 1.0 tg1p13deb13 a5d4...ceb0 3.6G 49% /disks/deb13
├─sda17 ext4 1.0 tg1p17deb11 5be1...5084 765.9M 86% /disks/deb11
# ls -gG /boot/grub2/grub.cfg
-rw------- 1 28238 Aug 21 16:21 /boot/grub2/grub.cfg
#
>> Do we know that the update-grub command normally writes to /boot/efi/EFI/,
>> and NVRAM (optional?)?
> Actually I tried dpkg-reconfigure for grub and shim packages and your
> message made me thinking that you may correct me and may provide proper
> commands to configure *UEFI* boot menu.
> From my old notes:
> <https://bugs.launchpad.net/bugs/1450783>
efibootmgr -c -L "opensusetw" -d /dev/sda1 -l '\EFI\opensusetw\grubx64.efi'
here has created a new entry in NVRAM when old was obsolete or deleted. It doesn't
create the opensusetw directory on the ESP. That is written by any process that
reads GRUB_DISTRIBUTOR= to determine where to do its writing on the ESP.
--
Evolution as taught in public schools is, like religion,
based on faith, not based on science.
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata
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