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[ubuntu] Audio randomly stopped, no longer detected properly

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linux-howto

http://ubuntuforums.org – So I've been running Ubuntu 12.04 for a few weeks now, and I upgraded to 12.10 the day it released, and up to now I've been having no problems with it. However, today something weird happened. I was experimenting with running a Windows program in WINE, when suddenly I noticed that I couldn't hear anything anymore. I figured it was just a temporary glitch, so I ALT-F2'd into a terminal and restarted GDM. Everything was normal again, sound was fine. But then I rebooted because I needed a real Windows install for a few minutes, and when I came back into Ubuntu, sound just failed to detect my hard (Hardware)