I think it would help if you could attach /var/log/syslog, /var/log/installer/syslog and /var/log/partman, as mentioned in the error text.
-- Installation crashed. 3rd time. Installation reached 22% then crashed https://launchpad.net/bugs/49646 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
