Public bug reported:
This is for:
Ubuntu 20.04 LTS
grub-common 2.04-1ubuntu26
I don't know how I got into this mess (maybe by removing ZFS @install
snapshots?), but update-grub stopped adding any Ubuntu entries to my
menu.cfg.
The culprit is the use of \t as a field separator in
/etc/grub.d/10_linux_zfs.
There's a line that says:
echo
"${dataset}\t${is_zsys}\t${machine_id}\t${pretty_name}\t${last_used}\t${initrd_device}\t${initrd_list}\t${kernel_list}\t${last_booted_kernel}"
Instead, it should say:
echo -e
"${dataset}\t${is_zsys}\t${machine_id}\t${pretty_name}\t${last_used}\t${initrd_device}\t${initrd_list}\t${kernel_list}\t${last_booted_kernel}"
By default, echo does not interpret the escaped tab sequence, \t. So all
of the awk lines that use it as a field separator elsewhere in the
script fail.
Adding the above -e flag fixed my problem.
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1876331
Title:
update-grub fails to add ZFS menu entries
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