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I'm newbie with Ubuntu -- I use ubuntu 14.04 LTS. I was trying to play some video using ubuntu video player and it required installing some plugins but this error occurred:

Package dependencies cannot be resolved

This error could be caused by required additional software packages
which are missing or not installable. Furthermore there could be a
conflict between software packages which are not allowed to be
installed at the same time.

and here more details:

The following packages have unmet dependencies:    
gstreamer1.0-libav: Depends: libavcodec-extra-54 (>= 6:9.13) but
6:9.18-0ubuntu0.14.04.1 is to be installed    
             Depends: libavformat54 (>= 6:9.1-1) but 6:9.18-0ubuntu0.14.04.1 is to be installed
             Depends: libavutil52 (>= 6:9.1-1) but 6:9.18-0ubuntu0.14.04.1 is to be installed
             Depends: libc6 (>= 2.14) but 2.19-0ubuntu6.6 is to be installed
             Depends: libglib2.0-0 (>= 2.37.3) but 2.40.2-0ubuntu1 is to be installed

I tried also to install VLC player and the package dependencies errors occurred again.

and here more details:

The following packages have unmet dependencies:
vlc: Depends: vlc-nox (= 2.1.6-0ubuntu14.04.1) but
2.1.6-0ubuntu14.04.1 is to be installed
      Depends: libc6 (>= 2.15) but 2.19-0ubuntu6.6 is to be installed
      Depends: libfreetype6 (>= 2.2.1) but 2.5.2-1ubuntu2.4 is to be installed
      Depends: libgcc1 (>= 1:4.1.1) but 1:5.1.0-0ubuntu11~14.04.1 is to be installed
      Depends: libqtcore4 (>= 4:4.8.0) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
      Depends: libqtgui4 (>= 4:4.8.0) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
      Depends: libstdc++6 (>= 4.6) but 5.1.0-0ubuntu11~14.04.1 is to be installed
      Depends: zlib1g (>= 1:1.2.3.3) but 1:1.2.8.dfsg-1ubuntu1 is to be installed

I tried a lot of solutions published on the internet but they didn't work

how can I solve these errors?

UPD: here's the content of the etc/apt/sources.list.d

google-chrome.list google-chrome.list.save

ubuntu-toolchain-r-test-trusty.list

ubuntu-toolchain-r-test-trusty.list.save

webupd8team-sublime-text-2-trusty.list

webupd8team-sublime-text-2-trusty.list.save

sorry of my bad language, English isn't my native..

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12
  • How did you install VLC-player ? (which command line, or which method ?)
    – green frog
    Jul 18, 2015 at 18:04
  • I used ubuntu software center.
    – Mahmoud Sayed
    Jul 18, 2015 at 18:06
  • using terminal can you test :sudo apt-get install vlc ?
    – green frog
    Jul 18, 2015 at 18:08
  • It said that "I have some broken packages"
    – Mahmoud Sayed
    Jul 18, 2015 at 18:10
  • could you please edit your answer by adding the content of /etc/apt/sources.list (this is the list of the repository then check if this file is update. (for example in france, my local list can be found here) Update Ok then, make a backup of your source.list and generate new list from source list generator and just add the lines into the source.list file
    – green frog
    Jul 18, 2015 at 18:18

1 Answer 1

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Try running the following command:

sudo apt-get update && sudo apt-get install -f

This will update your repo cache and then will fix most dependency issues.

If this still fails, please try running the below command and then running the above command immediately after.

sudo apt-get update && sudo apt-get dist-upgrade

This will update all of your software and ensure that you're running on the latest version of Ubuntu.

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3
  • !!! I would not run sudo apt-get dist-upgrade!!! Won't that upgrade him from Ubuntu 14.04 LTS to Ubuntu 15.04 (not LTS!)
    – Michael Butler
    Jul 18, 2015 at 20:00
  • 2
    @MichaelButler IIRC, dist-upgrade does not change your distribution, but it will solve package conflicts. See here for more info.
    – Kaz Wolfe
    Jul 18, 2015 at 20:02
  • Seriously, why can't we downvote comments.
    – mchid
    Jun 3, 2016 at 8:59

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