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

This question already has an answer here:

These are the updates:

-Safe and easy web browser from Mozilla firefox
-Safe and easy web browser from Mozilla- Unity menubar integration firefox-gobalmenu
-Safe and easy web browser from Mozilla-GNOME support firefox-gnome-support
-Linux kernal image for version 3.5.0 on 32 bit x86 SMP linux-image-3.5.0-gereric (New install)

And this is the output:

The package system is broken 

Check if you are using third party repositories. If so disable them, since they are a common source of problems. 
Furthermore run the following command in a Terminal: apt-get install -f


The following packages have unmet dependencies: 

linux-image-generic-lts-quantal: Depends: linux-image-3.5.0-26-generic but it is not installed
share|improve this question

marked as duplicate by Eliah Kagan, Thomas Ward, Eric Carvalho, Basharat Sialvi, Seth Apr 5 '13 at 3:25

This question was marked as an exact duplicate of an existing question.

If you can, upload all the output that you get into and then link it here. Also, take a look at How do I resolve unmet dependencies? – Lucio Apr 4 '13 at 23:40
Finally, tell us what you get entering sudo apt-get install linux-image-3.5.0-26-generic in a terminal. – Lucio Apr 4 '13 at 23:41
Welcome to Ask Ubuntu! This question will probably be closed as a duplicate soon. If those answers don't fully address your question please edit it to include why and flag this for re-opening. Thanks! – Seth Apr 5 '13 at 3:25

a few simple things I would try when this happens: (but I am not an expert...)
- click the Check button again before clicking the install updates button.
- disable ppa's that cause problems (I don't know whether you use a ppa for linux-image-generic-lts-quantal?)
- chose an other Download server under update manager -> settings -> ubuntu Software -> download from:

share|improve this answer

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