Comment 4 for bug 718199

Thanks for your report.

Here is the error
Feb 13 15:20:45 ubuntu ubiquity[15321]: debconffilter_done: ubi-language (current: ubi-language)
Feb 13 15:20:45 ubuntu ubiquity[15321]: Step_before = language
Feb 13 15:20:54 ubuntu ubiquity[15321]: Exception in KDE frontend (invoking crash handler):
Feb 13 15:20:54 ubuntu ubiquity[15321]: Traceback (most recent call last):
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/ubiquity/frontend/kde_ui.py", line 447, in <lambda>
Feb 13 15:20:54 ubuntu ubiquity[15321]: QTimer.singleShot(0, lambda: self.dbfilter.start(auto_process=True))
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 90, in start
Feb 13 15:20:54 ubuntu ubiquity[15321]: prep = self.prepare()
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 294, in prepare
Feb 13 15:20:54 ubuntu ubiquity[15321]: self.setup_sufficient_space()
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 302, in setup_sufficient_space
Feb 13 15:20:54 ubuntu ubiquity[15321]: self.ui.set_sufficient_space(self.big_enough(size))
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 325, in big_enough
Feb 13 15:20:54 ubuntu ubiquity[15321]: break
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/python2.6/contextlib.py", line 34, in __exit__
Feb 13 15:20:54 ubuntu ubiquity[15321]: self.gen.throw(type, value, traceback)
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/ubiquity/misc.py", line 113, in raised_privileges
Feb 13 15:20:54 ubuntu ubiquity[15321]: yield
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/ubiquity/plugins/ubi-prepare.py", line 320, in big_enough
Feb 13 15:20:54 ubuntu ubiquity[15321]: devices = proc.communicate()[0].rstrip('\n').split('\n')
Feb 13 15:20:54 ubuntu ubiquity[15321]: File "/usr/lib/python2.6/subprocess.py", line 683, in communicate
Feb 13 15:20:54 ubuntu ubiquity[15321]: stdout = self.stdout.read()
Feb 13 15:20:54 ubuntu ubiquity[15321]: IOError: [Errno 4] Interrupted system call