[ubuntu] Left and right channels are flip-flopped

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http://ubuntuforums.org – When I do "Test Sound" from the sound options and I play the test sound for the right speaker, it plays for the left speaker and vice versa. Also, anything I play sounds crappier. And my front-panel audio jack doesn't work. Is this a normal problem for Ubuntu users? My sound card is the Asus Xonar DG. Everything works fine in Windows. (Hardware)