I was about to file a new BUG Report. I did a quick fix and uploaded to one of my Repositories: https://github.com/luckylinux/grub- scripts/commit/59f90b0f751fb1241b0243dc5700522ffe73bf8e
Basically you need to add one mount / umount command for the /usr Dataset whenever the / and/or /etc Dataset is mounted. One Command is probably NOT needed as it generates an "unmount Error", but the other seems to be. Any change of getting this (FINALLY !) Fixed and Upstreamed ? Thanks Before Fix: ======================================================================================================== root@LiveUbuntu02:/# update-grub Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/lubuntu-grub-theme.cfg' Generating grub configuration file ... /etc/grub.d/10_linux_zfs: 403: .: cannot open /tmp/zfsmnt.NYQsLe/etc/os-release: No such file Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done ======================================================================================================== After Fix: ======================================================================================================== root@LiveUbuntu02:/# update-grub Sourcing file `/etc/default/grub' Sourcing file `/etc/default/grub.d/lubuntu-grub-theme.cfg' Sourcing file `/etc/default/grub.d/zfs.cfg' Generating grub configuration file ... Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1715 Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1715 Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1715 Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1715 umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_hourly-2023-12-31-1717 Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_hourly-2023-12-31-1717 Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_hourly-2023-12-31-1717 Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_hourly-2023-12-31-1717 umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu@install Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu@install Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu@install Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu@install umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1730 Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1730 Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1730 Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1730 umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. Found linux image: vmlinuz-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1745 Found initrd image: initrd.img-6.8.0-35-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1745 Found linux image: vmlinuz-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1745 Found initrd image: initrd.img-6.5.0-14-generic in rpool/ROOT/ubuntu@zfs-auto-snap_frequent-2023-12-31-1745 umount: /tmp/zfsmnt.Q0TA2T/usr: not mounted. /etc/grub.d/10_linux_zfs: 406: .: cannot open /.zfs/snapshot/20240619_fix_nested_zfs_datasets/etc/os-release: No such file Warning: os-prober will not be executed to detect other bootable partitions. Systems on them will not be added to the GRUB boot configuration. Check GRUB_DISABLE_OS_PROBER documentation entry. Adding boot menu entry for UEFI Firmware Settings ... done ======================================================================================================== EDIT 1: on one system, my proposed fix performed correctly. On another one, it failed with ======================================================================================================== /etc/grub.d/10_linux_zfs: 406: .: cannot open /.zfs/snapshot/20240619_fix_nested_zfs_datasets/etc/os-release: No such file ======================================================================================================== -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899372 Title: update-grub 10_linux_zfs fails when /usr is a separate filesystem To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1899372/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
