Ошибка при попытке обновить Ubuntu 12.04 До 14.04

Произошла критическая ошибка

Пожалуйста, сообщите об этой ошибке и включите файлы
/var/log/dist-upgrade/main.log и /var/log/dist-upgrade/apt.log в ваш
отчёт. Обновление было отменено.
Ваш оригинальный файл sources.list был сохранён в
/etc/apt/sources.list.distUpgrade.

Traceback (most recent call last):

File "/tmp/update-manager-Xw1DWJ/trusty", line 10, in <module>
sys.exit(main())

File "/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeMain.py",
line 244, in main
if app.run():

File
"/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeController.py",
line 1827, in run
return self.fullUpgrade()

File
"/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeController.py",
line 1649, in fullUpgrade
if not self.prepare():

File
"/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeController.py",
line 441, in prepare
self._sshMagic()

File
"/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeController.py",
line 332, in _sshMagic
self._view.information(summary, descr)

File "/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeViewText.py",
line 147, in information
readline()

File "/tmp/update-manager-Xw1DWJ/DistUpgrade/DistUpgradeViewText.py",
line 47, in readline
s = sys.stdin.readline()

KeyboardInterrupt
=== Command terminated with exit status 1 (Fri Oct  3 13:52:41 2014) ===