If it locks, that's a kernel bug. See if you can duplicate the hang using parted's resize command?
** Changed in: ubiquity (Ubuntu) Sourcepackagename: ubiquity => linux-source-2.6.17 -- Computer locks hard when trying resize FS https://launchpad.net/bugs/58944 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
