I was having the same issue with 15.10 install media but resolved it by booting into the live session, opening a terminal, using fdisk to create a new GPT table, making one giant partition, formatting it, then proceeding with install. Install went off without a hitch.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1361951 Title: Ubiquity freezes while reformatting occupied partition To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-ext3/+bug/1361951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
