Comment 8 for bug 1848856

I modified 10_linux_zfs to comment out the set -e and add the variables for pkgdatadir and the GRUB* variables from /etc/default/grub and ran it to see the output.

Notice at the end the double brace, lack of initrd value and linux image even though it was found at the beginning when it correctly identified the root dataset.

jpb@explorer:~/test$ sudo ./10_linux_zfs
Found linux image: vmlinuz-5.0.0-29-generic in rpool/ROOT/ubuntu
Found initrd image: initrd.img-5.0.0-29-generic in rpool/ROOT/ubuntu
Found linux image: vmlinuz-5.0.0-31-generic in rpool/ROOT/ubuntu
Found initrd image: initrd.img-5.0.0-31-generic in rpool/ROOT/ubuntu
Found linux image: vmlinuz-5.0.0-32-generic in rpool/ROOT/ubuntu
Found initrd image: initrd.img-5.0.0-32-generic in rpool/ROOT/ubuntu
Found linux image: vmlinuz-5.3.0-18-generic in rpool/ROOT/ubuntu
Found initrd image: initrd.img-5.3.0-18-generic in rpool/ROOT/ubuntu
Found linux image: vmlinuz-5.0.0-23-generic in rpool/ROOT/ubuntu@pyznap_2019-08-18_14:11:36_monthly
Found initrd image: initrd.img-5.0.0-23-generic in rpool/ROOT/ubuntu@pyznap_2019-08-18_14:11:36_monthly

********** removed a ton of snapshots that were listed which found the linux image and initrd image. *****************

Found linux image: vmlinuz-5.3.0-18-generic in rpool/ROOT/ubuntu@apt2019-10-19_08.52.43--1w
Found initrd image: initrd.img-5.3.0-18-generic in rpool/ROOT/ubuntu@apt2019-10-19_08.52.43--1w

function gfxmode {
 set gfxpayload="${1}"
 if [ "${1}" = "keep" ]; then
  set vt_handoff=vt.handoff=1
 else
  set vt_handoff=
 fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu 19.10' --class ubuntu --class gnu-linux --class gnu --class os ${menuentry_id_option} 'gnulinux-rpool/ROOT/ubuntu-' {
 recordfail
 load_video
 gfxmode ${linux_gfx_mode}
 insmod gzio
 if [ "${grub_platform}" = xen ]; then insmod xzio; insmod lzopio; fi
 insmod part_gpt
 insmod zfs
 set root='hd2,gpt1'
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root --hint-bios=hd2,gpt1 --hint-efi=hd2,gpt1 --hint-baremetal=ahci2,gpt1 ba04856b80ac4244
 else
   search --no-floppy --fs-uuid --set=root ba04856b80ac4244
 fi
 linux root=ZFS=rpool/ROOT/ubuntu ro intel_iommu=on iommu=pt quiet splash intel_iommu=on iommu=pt rootdelay=3 zswap.enabled=1 zswap.compressor=lz4 zswap.zpool=z3fold ${vt_handoff}
 initrd
}
}