Comment 4 for bug 219658

I experience the same kind of issue with SB Live 5.1 in Ubuntu 8.10. During start-up noise starts coming out of speakers and stills until complete shut down. I can here normal sounds (ubuntu sounds, music and so on) through this noise but it is louder and more strong.

Output of alsa-info.sh:
http://www.alsa-project.org/db/?f=b5be227d2ae8433b58a802f21583ae98c3035700