Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Screenshot of Distribution Upgrade failure I had Ubuntu 11.10 installed in a virtual machine. Attempted to upgrade it to 12.04 and it hung at Installing the upgrades/preparing libco. Left it there all day. Still able to navigate around it, but ultimately at the end of the day it still did not finish upgrading. Attempted to reboot it and in return it just flickered during boot up.

system state frozen, preparing libco stuck, installing upgrades, 12.04

Reinstalling from scratch.

share|improve this question

Try updating from the command line.

sudo apt-get update && sudo apt-get upgrade
share|improve this answer
Are you suggesting to try to perform a release upgrade from the command line, or to try to fix (i.e., finish) an interrupted one? The former would be sudo do-release-upgrade and the latter would be sudo apt-get update && sudo apt-get dist-upgrade (since finishing such an upgrade requires that some packages be newly installed and others removed, which upgrade will never do). – Eliah Kagan Jun 21 '12 at 3:00

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.