unable to install 11.10, "no root file system is defined" [64 bit]

[shivanayak@gmail.com]

I was trying to feed the pressed to ubiquity while installing xubuntu 11.10 .

Following is what I used in preseeding, and I used debconf-set-selections to set the below preseed.

__________________________________________________ ____________________________
ubiquity localechooser/preferred-locale select en_US.UTF-8
ubiquity debconf/language string en
ubiquity localechooser/languagelist select en
ubiquity debian-installer/language string en
ubiquity partman-auto/init_automatically_partition select 80custom__________custom
keyboard-configuration keyboard-configuration/unsupported_options boolean false
ubiquity partman/default_filesystem string ext4
ubiquity partman-auto/choose_recipe select myboot-root
ubiquity partman-auto/expert_recipe string \
myboot-root :: \
1 50 10240 ext4 \
$primary{ } $bootable{ } \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ / } \
. \
64 512 8172 linux-swap \
method{ swap } format{ } \
. \
500 10000 30720 ext4 \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /backup_fs } \
. \
500 10000 10000000 ext4 \
method{ format } format{ } \
use_filesystem{ } filesystem{ ext4 } \
mountpoint{ /home } \
.
ubiquity partman/confirm_write_new_label boolean false
ubiquity partman/choose_partition select finish
ubiquity partman/confirm boolean true
ubiquity partman-target/choose_method select 25filesystem__________ext4

__________________________________________________ ____________________________

And when I excute the ubiquity with --automatic option, it ends up with the error "no root file system is defined".

Below is the information for debugging purpose. Any help to solve this problem is appreciated. Thank you.


__________________________________________________ ____________________________
diskinfo-beforepartition.txt (http://ubuntuforums.org/attachment.php?attachmentid=209712&stc=1&d=1324888390)

[shivanayak@gmail.com]

Manually created the 4 partitions on the dev/sda so as to check if the ubiquity can make use of the existing partitions, but ubiquity fails with the same above ("no root file system is defined") error.


Below is the system info after I created the partitions on the dev/sda .

__________________________________________________ ___________________________________

diskinfo-afterpartition.txt (http://ubuntuforums.org/attachment.php?attachmentid=209711&stc=1&d=1324888230)