I installed Kubuntu Live version and sound card visible in the volume/mixer panel. After installing the permanent version I have a dummy output where my sound card should be, therefore no sound. I re-installed the live version three times and then to permanent but the same problem each time. There is a very brief error on boot up to the permanent version that says:

error. cannot attach card default. no such file or directory.

I'm running Kubuntu 12.04 on a Mac G4 PPC with no other OS.

I'm very new to Linux. I am able to follow instructions to help resolve this, but I'm not familiar with the OS.