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Why can't I start the Software-Sources Dialogue?

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http://askubuntu.com – I'm using Ubuntu 12.10 and I would like to install additional drivers, but as the title says, it's not possible to start the Software Sources GUI. The Menu Entry in the Ubuntu Software-Center Edit > Software Sources is disabled and not clickable: Can anybody tell me how I can start that Software-Sources dialogue? Hope anybody can help... Clemens (HowTos)

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Submitted by funckax on 11/05/2012 – Made popular on 11/05/2012

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New install of Ubuntu 12.04.1. Start Ubuntu Software Center. Edit menu > Software Sources > Other > tick the Canonical Partners sources. Click close.

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Here's my geeky tip for updating your /etc/apt/sources.list on Ubuntu GNU/Linux.This tip is especially useful around April/October when the new Ubuntu releases are freed into the wild and the main servers are very busy.I know what you're saying: This can easily be done from the  Ubuntu Software Center via the edit > sources menu.

W: failed to fetch 34 weeks 21 hours ago

Go to Ubuntu Software Center. Edit > Software Sources Change the server from the default value to some other value. Click Close. You'd need to enter your password. Run sudo apt-get update to check.

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open the Software center. Click on edit and then software sources to open the software sources window.

Ubuntu Sources List Generator 3 years 18 weeks ago

The Ubuntu sources.list generator, is a web application that can create custom sources.list files for various version of Ubuntu. The sources.list file tells the packaging system where it can look for software to install. The generator can add many additional sources, including those for proprietary software.  

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I just got a problem with software installation and software sources on my Ubuntu.

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Edit: It occurs to me I was too lazy with asking this question. For the past several months, I have been getting a system error that does not "break" the system but indicates software properties has timed out. I cannot get software sources to run as an application. sources.list opens and seems fine.

Hi. I recently installed Ubuntu Server 11.10. But I cannot install any software using the "apt-get" command. I think that's because the software sources for my country (Bangladesh) don't really work.

In Ubuntu 11.10 I managed to change the sources from the software center. I use Ubuntu main server as the source and it works.

When I want to change the mirror I am using for updates, I can open the Software Centre, and go to Edit->Software Sources, and from there select another server.

This then goes through my /etc/apt/sources.list file, and replaces all the instances of the old mirror URL, with the new mirror URL.

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I am using ubuntu gnome remix 12.10 with ATI mobility radeon HD 4300 graphics card. Software sources do not show any additional drivers. How do I install the graphics drivers for my system? $ lspci | grep VGA 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV710 [Mobility Radeon HD 4300 Series]