Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

For some reason, whenever I try to search for updates with Ubuntu 12.10's update manager, I always get this error: Failed to download repository information, followed by the following details:

W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/Release.gpg Unable to connect to extras.ubuntu.com:http:

, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en Unable to connect to extras.ubuntu.com:http:

, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/i18n/Translation-en_CA Unable to connect to extras.ubuntu.com:http:

, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/source/Sources Unable to connect to extras.ubuntu.com:http:

, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-amd64/Packages Unable to connect to extras.ubuntu.com:http:

, W:Failed to fetch http://extras.ubuntu.com/ubuntu/dists/quantal/main/binary-i386/Packages Unable to connect to extras.ubuntu.com:http:

, E:Some index files failed to download. They have been ignored, or old ones used instead.

Initially I thought that for whatever reason the repositories were down, so I switched from the Canada server to the main server. I still got the same error. I also tried installing some things from the ubuntu software center. Funny thing is, that worked fine and I was able to successfully download and install software from the software center, so it seems that only update manager can't access the repositories.

I have searched for and found similar cases (relating to ubuntu 12.10), but most of those cases involved ppa's, and I don't use any ppa's.

Help would be appreciated. Thanks.

share|improve this question
add comment

2 Answers 2

If you are using a proxy, you will not be able to use the Update Manager without configuring your system appropriately.

The Ubuntu Update Manager uses the same proxy configuration as apt-get, the problem with this is that the system proxy setting does not alter the apt-get proxy setting. This must be done manually by editing sudo nano /etc/apt/apt.conf and add the relevant data. An example of a http proxy server is

Acquire::http::proxy "http://username:password@proxy:port/";

Make sure that your password does NOT contain any non-ASCII chars as this might create some problems due to the files encoding.

share|improve this answer
add comment

I am using the GNOME desktop and was having the same problem. Here's what I did:

  1. I went to Administration and started Software Updater.

  2. I then clicked on Stop for it to stop updating. It went to saying I canceled updating then had a tab to the left for settings.

  3. I clicked on Settings the screen came up.

    • Under Ubuntu software, I unchecked everything then checked the top three under downloadable from the Internet:

      • canonical supported
      • community maintained
      • proprietary drivers (I have a video card that can use these drivers)
    • Under other software I unchecked all

    • Then checked the first two canonical partners
    • I then closed Software Sources out and then restarted Software Updater
    • I waited to see if it worked and it did
  4. I made a few adjustments before doing this but the adjustments never worked.

    I went to the web page that failed to load by typing in the address in the web browser I was using. I then clicked on the links to go down through the web pages the Software Updater could not go to before I changed the settings in Software Updater.

  5. Then back to Other Software

    Once the Canonical sources worked under other Software, I added the other software sources one at a time then closed it out and run Software Updater.

    My other sources were:

    • independent provided by other software http://packages.medibuntu.org
    • added by software center ryzom
    • added by software center pct-listen
    • added by software center lord of ultima

    Under Update tab:

    • check only important security updates and recommended updates

    Under additional drivers I am using:

    • X.org x server - AMD/ATI display driver wrapper

I am not a expert at Linux but hope this helps.

share|improve this answer
add comment

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.