Public bug reported: I just decided to test a new Ubuntu, so upgraded my 25.10 to 26.04.
Had no errors in console during upgrade, but after install system failed to properly reboot. And after rebooting manually I found out that kernel 7.0 has no zfs support and fails to mount root. Hopefully I was able to boot with my previous kernel 6.17.0-19-generic and started to investigate and learned, that package linux-image-generic is not properly installed, as it depends on linux-modules-zfs-generic and if I try to install this one it requires a removal of zfs-zed zfsutils-linux packages. And if I allow these to be removed, package fails installation as it can't find zpool anymore. Here's the console log: sudo apt install --reinstall linux-image-generic The following packages were automatically installed and are no longer required: libzfs7linux libzpool7linux Use 'sudo apt autoremove' to remove them. Installing: linux-image-generic Installing dependencies: linux-main-modules-zfs-7.0.0-7-generic REMOVING: zfs-zed zfsutils-linux Summary: Upgrading: 0, Installing: 2, Removing: 2, Not Upgrading: 0 Download size: 2 400 kB Space needed: 201 kB / 182 GB available Continue? [Y/n] Get:1 https://mirror.timeweb.ru/ubuntu resolute/main amd64v3 linux-main-modules-zfs-7.0.0-7-generic amd64 7.0.0-7.7+1 [2 397 kB] Get:2 https://mirror.timeweb.ru/ubuntu resolute/main amd64v3 linux-image-generic amd64 7.0.0-7.7 [2 576 B] Fetched 2 400 kB in 1s (2 720 kB/s) (Reading database… 267555 files and directories currently installed.) Removing zfs-zed (2.4.1-1ubuntu1)… Removing zfsutils-linux (2.4.1-1ubuntu1)… Selecting previously unselected package linux-main-modules-zfs-7.0.0-7-generic. (Reading database… 267224 files and directories currently installed.) Preparing to unpack …/linux-main-modules-zfs-7.0.0-7-generic_7.0.0-7.7+1_amd64.deb… Unpacking linux-main-modules-zfs-7.0.0-7-generic (7.0.0-7.7+1)… Selecting previously unselected package linux-image-generic. Preparing to unpack …/linux-image-generic_7.0.0-7.7_amd64.deb… Unpacking linux-image-generic (7.0.0-7.7)… Setting up linux-main-modules-zfs-7.0.0-7-generic (7.0.0-7.7+1)… Setting up linux-image-generic (7.0.0-7.7)… Processing triggers for man-db (2.13.1-1build1)… Processing triggers for linux-image-7.0.0-7-generic (7.0.0-7.7)… /etc/kernel/postinst.d/initramfs-tools: update-initramfs: Generating /boot/initrd.img-7.0.0-7-generic I: The initramfs will attempt to resume from /dev/nvme0n1p2 I: (UUID=90cf11bf-de3d-4b02-ac5d-70820dd2efb4) I: Set the RESUME variable to override this. /etc/kernel/postinst.d/kdump-tools: kdump-tools: Generating /var/lib/kdump/initrd.img-7.0.0-7-generic /usr/sbin/mkinitramfs: 545: zpool: not found /etc/kernel/postinst.d/zz-update-grub: /usr/sbin/grub-probe: error: failed to get canonical path of `rpool/ROOT/ubuntu_ad3ug5'. run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1 dpkg: error processing package linux-image-7.0.0-7-generic (--configure): old linux-image-7.0.0-7-generic package postinst maintainer script subprocess failed with exit status 1 Errors were encountered while processing: linux-image-7.0.0-7-generic Error: Sub-process /usr/bin/dpkg returned an error code (1) Any clue how to resolve this issue? ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-modules-zfs-generic (not installed) ProcVersionSignature: Ubuntu 6.17.0-19.19-generic 6.17.13 Uname: Linux 6.17.0-19-generic x86_64 NonfreeKernelModules: zfs ApportVersion: 2.33.1-0ubuntu3 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Thu Mar 19 23:20:04 2026 InstallationDate: Installed on 2022-04-28 (1421 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419) RebootRequiredPkgs: Error: path contained symlinks. SourcePackage: linux-main-signed UpgradeStatus: Upgraded to resolute on 2026-03-19 (0 days ago) ** Affects: ubuntu Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session zfs -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2144944 Title: Upgrade from 25.10 to 26.04 has issues with zfs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/2144944/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
