[ubuntu] sound died in right speaker

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http://ubuntuforums.org – I had the same sort of problem a week or so ago but when I did the alsa update thing I lost sound altogether for days, eventually got it working again and the right speaker went quiet so I clicked on the gnome alsa mixer I keep in the launcher and the sound in the right speaker reappeared for a while but then died. I've checked connections, the speaker, the balance, the volume, made sure nothings muted etc with no luck. It's a realtek ac'97 onboard soundcard Code: lspci | grep audio 00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R) AC'97 Audio Controller (rev (Hardware)