Comment 7 for bug 433092

I just happened to run into the same or similar issues recently when attempting to fully automate differing un-attended system builds with ubuntu 14.04 on amd64

I was able to make the provided -atomic and -home recipes work, but they don't offer any control over the sizing of the logical volumes.
The -multi recipe doesn't work.

The expert-recipes don't work either, no matter what I specified, the end was result was the same, I'd get a /root a /swap_1 logical volume and /boot partition, and never close to the sizes specified, nor the filesystem type specified, nor the logical volume name specified :-)

Below are the options and recipe used.
I was about to try using kickstart versus preseed to try and setup LVM on ubuntu how I want. On my rhel/centos systems customizing LVM is a breeze with kickstart automation

### Partitioning
d-i partman-auto/disk string /dev/sda
d-i partman-auto/method string lvm
d-i partman-lvm/device_remove_lvm boolean true
d-i partman-md/device_remove_md boolean true
d-i partman-lvm/confirm boolean true
d-i partman-lvm/confirm_nooverwrite boolean true
# You can choose one of the three predefined partitioning recipes:
# - atomic: all files in one partition
# - home: separate /home partition
# - multi: separate /home, /var, and /tmp partitions
#d-i partman-auto/choose_recipe select atomic
#d-i partman-auto/choose_recipe select expert-recipe
# Give the default VG a name
d-i partman-auto-lvm/new_vg_name string vg
d-i partman-auto/purge_lvm_from_device boolean true
d-i partman-auto-lvm/guided_size string 90%
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
d-i partman-md/confirm boolean true
d-i partman-partitioning/confirm_write_new_label boolean true
d-i partman/choose_partition select finish
d-i partman/confirm boolean true
d-i partman/confirm_nooverwrite boolean true
####
# Experimental disk recipe
#####
d-i partman-auto/expert_recipe string
  custom-lvm :: \
              40 300 300 ext4 \
                      $primary{ } \
                      $bootable{ } \
                      method{ format } format{ } \
                      use_filesystem{ } filesystem{ ext4 } \
                      mountpoint{ /boot } \
              . \
              2000 4000 10000 ext4 \
                      $lvmok{ } lv_name{lv_root} \
                      method{ format } format{ } \
                      use_filesystem{ } filesystem{ ext4 } \
                      mountpoint{ / } \
              . \
              2000 1000 2000 ext4 \
                      $lvmok{ } lv_name{lv_var} \
                      method{ format } format{ } \
                      use_filesystem{ } filesystem{ ext4 } \
                      mountpoint{ /var } \
              . \
              2000 1000 2000 ext4 \
                      $lvmok{ } lv_name{lv_home} \
                      method{ format } format{ } \
                      use_filesystem{ } filesystem{ ext4 } \
                      mountpoint{ /home } \
              . \
              512 512 512 linux-swap \
                      $lvmok{ } lv_name{lv_swap} \
                      method{ swap } format{ } \
              .