Since Windows 7 utterly failed to recognise my built-in audio card, I figured I'd just buy a SoundBlaster. At first everything was fine, it worked perfectly in both Windows and Linux. However, now, when I boot Kubuntu, computer doesn't produce any legible sound. Whenever there should be any sound (like on system start or with some notifications), speakers just fizz at the top of their voice. It works fine in Windows, so it shouldn't be a hardware problem. What can be wrong?
I'm running Kubuntu 10.10. Also maybe I should mention that I bought and installed SoundBlaster after installing Kubuntu.