Downgrade 'local' packages in Debian/Ubuntu

Posted by Matt Joiner on Super User See other posts from Super User or by Matt Joiner
Published on 2010-09-30T03:33:40Z Indexed on 2010/12/25 11:56 UTC
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ubuntu

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debian

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apt

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synaptic

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deb

I recently unticked the "pre-released updates" option in Software Sources on my Ubuntu Lucid 10.04.1 installation. The Ubuntu wiki states the following regarding this source:

The proposed updates are updates which are waiting to be moved into the recommended updates queue after some testing. They may never reach recommended or they may be replaced with a more recent update.

Roughly 20 installed packages have indeed not made it into recommended updates, and occasionally cause conflicts when I install new software, as related packages of the newer version are unavailable now that I've disabled the source.

How can I force a downgrade of all packages for which an earlier version exists in a enabled repository?

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