no audio?

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http://www.linuxquestions.org – I recently recycled an old motherboard to build a computer for a friend... When I used it, I had many different versions of Ubuntu, Xubuntu, Kubuntu, etc., installed (at different times), and the audio always worked. It is an ASUS p5q, with a realtek 888s chipset. the last version I used with it installed in my computer was 10.04. well, now I tried 10.04 again, and the audio worked fine...Until one day, it just quit. I even tried using the audio via HDMI over the 4670 I have installed in the board. nothing. I had installed a kernel update about 2 days prior, so that is not the issue...I (HowTos)