[ubuntu] Flash video, video and audio problems(lag, slowness) at AMD64 Ubuntu 12.04 32 bit

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http://ubuntuforums.org – Hello, I have a amd64 desktop, which I've used gentoo and linux mint before, and did not have issues with audio. Since few months I have ubuntu 12.04(32 bit version), and have horrible multimedia experience. It's my work PC, so video + music is not a must have, but it starts to upset me when I want to listen to music, watch youtube once in a while. My problems are: 1) Flash videos are not watchable, both audio and video are jumpy. 2) Downloaded videos(any format) and music lag once in a while, (it loops a specific part, like its a remix :)). I have searched a lot and read the following t (Hardware)