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I received a notification that my previous version was ending support so I upgraded to the latest LTS Ubuntu version, 12.04.

Since then the sound card is not working properly, i.e. every video played (from different sources: HD, Utube, CBC, etc) are live over dubbed, like if I was starting the video and then starting another playback 30 seconds later and so on, until the sound-track plays over itself and it is unintelligible.

The sound was fine a couple of updates ago, but I downgrade to a version where the sound card driver works properly.

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