Public bug reported:
There are multiple use cases which require both BIOS and UEFI bootloaders
installed on a target image and to keep them both updated.
- cloud images on clouds that support both BIOS and UEFI boot in alternate
instance types
- PC installs that should remain bootable in the face of firmware upgrades or
reconfigurations
This currently doesn't work because 'grub-install' selects its install
target based on which of grub-pc or grub-efi-amd64 is installed.
We should support a package upgrade workflow that supports updating both
bootloaders on disk wherever possible, including use of --no-nvram
automatically when necessary, and does not fail awkwardly if e.g. the
system is booted under BIOS and there is no EFI System Partition
present.
The problem is, if the system is booted in BIOS mode and you call grub-
install --target=x86_64-efi, the install will fail because it can't
write to EFI nvram variables.
There is a --no-nvram flag, but it's incorrect for us to pass this
unconditionally, because it's the wrong thing to do when we are booted
in UEFI mode.
So we need some smarts in grub-install for an additional mode that only
skips nvram if there is no nvram available.
** Affects: grub-installer (Ubuntu)
Importance: Undecided
Status: New
** Affects: grub2 (Ubuntu)
Importance: Undecided
Assignee: Łukasz Zemczak (sil2100)
Status: New
** Affects: grub2-signed (Ubuntu)
Importance: Undecided
Status: New
** Affects: shim-signed (Ubuntu)
Importance: Undecided
Status: New
** Affects: grub-installer (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: grub2 (Ubuntu Bionic)
Importance: Undecided
Assignee: Łukasz Zemczak (sil2100)
Status: Confirmed
** Affects: grub2-signed (Ubuntu Bionic)
Importance: Undecided
Status: New
** Affects: shim-signed (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: grub2 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: grub2 (Ubuntu Bionic)
Status: New => Confirmed
** Changed in: grub2 (Ubuntu Bionic)
Assignee: (unassigned) => Łukasz Zemczak (sil2100)
** Also affects: grub2-signed (Ubuntu)
Importance: Undecided
Status: New
** Also affects: shim-signed (Ubuntu)
Importance: Undecided
Status: New
** Also affects: grub-installer (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1778848
Title:
Support for grub upgrades with bios+uefi bootloader targets
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