i am with ubuntu operating system and as there is no need to install drivers i made use of it. i recently upgraded myself to Karmic and there were some problems with sound.
there were several problems as mentioned below.
there was no detection of audio card .
there was a returning of an empty content in the cat /proc/asound/cards
there was no inclusion of audio devices in cat /proc/asound/devices
'Hardware' tab which was present in sound preferences was found to be empty
there was a indication of "dummy output" in the audio tray.
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