Public bug reported:
[Impact]
Ubuntu's ZFS boot support (`/etc/grub.d/10_linux_zfs`) does not add the
`savedefault` command to non-recovery entries. This differs from the
`/etc/grub.d/10_linux` (without ZFS) behavior, which adds `savedefault` to
non-recovery entries.
[Test Case]
1. On a system that has a ZFS root (e.g. one installed with zsys), run `sudo
update-grub`.
2. See that there are no mentions of `savedefault` in the relevant
generated section:
sed -n '/^### BEGIN \/etc\/grub\.d\/10_linux_zfs ###$/,/^### END
\/etc\/grub\.d\/10_linux_zfs ###$/p;/^### END
\/etc\/grub\.d\/10_linux_zfs ###$/q' /boot/grub/grub.cfg | grep
savedefault
If this bug is fixed, the command above will return an output that has
the string "savedefault".
[Regression Potential]
The patch makes the `/etc/grub.d/10_linux_zfs` logic for adding the
`savedefault` command the same as that of `/etc/grub.d/10_linux`. It is a
behavioral change but restores consistency with the non-ZFS Linux entry
generator. The change should only affect those using the
`GRUB_SAVEDEFAULT=true` and `GRUB_DEFAULT=saved` options in `/etc/default/grub`.
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
** Tags: eoan patch
** Patch added: "/etc/grub.d/10_linux_zfs: Restore missing `savedefault`
command generator"
https://bugs.launchpad.net/bugs/1850202/+attachment/5300961/+files/10_linux_zfs.patch
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https://bugs.launchpad.net/bugs/1850202
Title:
/etc/grub.d/10_linux_zfs doesn't add savedefault
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