Public bug reported:
This issue was encountered on a virtual machine installation of Ubuntu
19.10 running zfs. After reloading several times from backup and
placing the original version of grub2 on hold it was verified that
upgrading to the newer version of grub caused update-grub to improperly
detect the two zfs datasets, bpool (boot pool) and rpool (root pool).
To recap:
1) lsb_release -rd
Description: Ubuntu Eoan Ermine (development branch)
Release: 19.10
2) apt-cache policy grub-pc
grub-pc:
Installed: 2.02+dfsg1-12ubuntu2
Candidate: 2.02+dfsg1-12ubuntu3 (version with issue in this report)
Version table:
2.02+dfsg1-12ubuntu3 500
500 http://archive.ubuntu.com/ubuntu eoan/main amd64 Packages
*** 2.02+dfsg1-12ubuntu2 100
100 /var/lib/dpkg/status
3) What I expected to happen: update-grub runs without error
4) What happened instead: update-grub did not run correctly, resulting in
unbootable system (only entries for memtest86+ in grub menu).
** Affects: grub2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1834095
Title:
update-grub fails on zfs with root and boot datasets
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