Ubuntu
zfs-linux package

  1. Bug #1959522
  2. Comment #0

Comment 0 for bug 1959522

Revision history for this message
Nicholas Harvey (mobile-harvey) wrote :

This issue seems similar to 1894329 but I can reproduce this consistently in 21.10.

Problem description:
Unable to reliably revert ZFS snapshots via the Grub menu in Ubuntu 21.10. When attempting a revert I am usually dropped to the emergency mode and have to force a reboot. After that it can take a number of attempts to get the system to reboot to the desktop.

Steps to reproduce:
Install Ubuntu 21.10 on Intel 64bit with ZFS selected as the filesystem. Do not encrypt.
Install all updates. ZFS snapshot is taken automatically.
Reboot.
Install a simple package i.e. sudo apt install neofetch. Another ZFS snapshot is taken automatically.
Reboot and enter the GRUB menu.
Enter History menu.
Select Revert to an earlier snapshot. In my case I select the snapshot taken after neofetch was installed.
Select install system files only. Do not select the recovery mode option.
System now boots and ends up dropping into emergency mode.

I can duplicate this on three different installs.

Expected outcome:
The snapshot is correctly reverted and the system boots without user interaction into the snapshot.