Comment 0 for bug 2031042

Tried to update my system today and got the error below. It's Mantic with the standard ZFS installation.

Setting up linux-image-6.3.0-7-generic (6.3.0-7.7+1) ...
Setting up grub-pc (2.12~rc1-4ubuntu1) ...
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
/etc/grub.d/10_linux_zfs: 425: version_find_latest: not found
umount: /tmp/zfsmnt.5DJ7yi: target is busy.
rmdir: failed to remove '/tmp/zfsmnt.5DJ7yi': Device or resource busy
dpkg: error processing package grub-pc (--configure):
 installed grub-pc package post-installation script subprocess returned error exit status 1
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          dpkg: dependency problems prevent configuration of grub-efi-amd64-signed:
 grub-efi-amd64-signed depends on grub-efi-amd64 | grub-pc; however:
  Package grub-efi-amd64 is not installed.
  Package grub-pc is not configured yet.

dpkg: error processing package grub-efi-amd64-signed (--configure):
 dependency problems - leaving unconfigured
Processing triggers for linux-image-6.3.0-7-generic (6.3.0-7.7+1) ...
/etc/kernel/postinst.d/dkms:
 * dkms: running auto installation service for kernel 6.3.0-7-generic
 * dkms: autoinstall for kernel 6.3.0-7-generic
   ...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-6.3.0-7-generic
W: Possible missing firmware /lib/firmware/amdgpu/ip_discovery.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vega10_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_0_toc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes1.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mes.bin for module amdgpu
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
/etc/grub.d/10_linux_zfs: 425: version_find_latest: not found
umount: /tmp/zfsmnt.ftFfAn: target is busy.
rmdir: failed to remove '/tmp/zfsmnt.ftFfAn': Device or resource busy
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-6.3.0-7-generic (--configure):
 installed linux-image-6.3.0-7-generic package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 grub-pc
 grub-efi-amd64-signed
 linux-image-6.3.0-7-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)

In the end these mount points where left behind:

rpool/ROOT/ubuntu_nedhsb on /tmp/zfsmnt.5DJ7yi type zfs (rw,noatime,xattr,posixacl,casesensitive)
bpool/BOOT/ubuntu_nedhsb on /tmp/zfsmnt.5DJ7yi/boot type zfs (rw,nodev,noatime,xattr,posixacl,casesensitive)
rpool/ROOT/ubuntu_nedhsb on /tmp/zfsmnt.ftFfAn type zfs (rw,noatime,xattr,posixacl,casesensitive)
bpool/BOOT/ubuntu_nedhsb on /tmp/zfsmnt.ftFfAn/boot type zfs (rw,nodev,noatime,xattr,posixacl,casesensitive)