[Bug 2119682] [NEW] 10_linux_zfs not adding new kernel

[J]

Public bug reported:

grub does not manage to change the config so it boots from the latest
kernel. It still uses the kernel on the original first snapshot I made.
It finds the new kernel but does not add it to grub.conf

I had to change the 10_linux_zfs to even add a config at all (somehow does not use the \t without it):
echo "${boot_list}" | awk 'BEGIN{FS="\t"}{ gsub(/\\t/, "\t")} { print $0 } ' 


# update-grub
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
grub-probe: error: unknown filesystem.
Found linux image: vmlinuz-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5
Found initrd image: initrd.img-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5
Found linux image: vmlinuz-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5 at original
Found initrd image: initrd.img-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5 at original
Found linux image: vmlinuz-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508050301
Found initrd image: initrd.img-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508050301
Found linux image: vmlinuz-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508060301
Found initrd image: initrd.img-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508060301
/usr/sbin/grub-probe: error: unknown filesystem.
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

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2119682

Title:
  10_linux_zfs not adding new kernel

Status in grub2 package in Ubuntu:
  New

Bug description:
  grub does not manage to change the config so it boots from the latest
  kernel. It still uses the kernel on the original first snapshot I
  made. It finds the new kernel but does not add it to grub.conf

  I had to change the 10_linux_zfs to even add a config at all (somehow does not use the \t without it):
  echo "${boot_list}" | awk 'BEGIN{FS="\t"}{ gsub(/\\t/, "\t")} { print $0 } ' 

  
  # update-grub
  Sourcing file `/etc/default/grub'
  Generating grub configuration file ...
  grub-probe: error: unknown filesystem.
  Found linux image: vmlinuz-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5
  Found initrd image: initrd.img-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5
  Found linux image: vmlinuz-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5 at original
  Found initrd image: initrd.img-6.8.0-55-generic in rpool/ROOT/ubuntu_6plur5 at original
  Found linux image: vmlinuz-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508050301
  Found initrd image: initrd.img-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508050301
  Found linux image: vmlinuz-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508060301
  Found initrd image: initrd.img-6.8.0-71-generic in rpool/ROOT/ubuntu_6plur5 at 202508060301
  /usr/sbin/grub-probe: error: unknown filesystem.
  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

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