Comment 8 for bug 279383

Everything seem correct in the output file :S
When you say it still doesn't work what kind of sound do you mean? You can playback MP3 o is the system sounds?

This is a well known bug, please read this section:

http://wiki.eeeuser.com/getting_ubuntu_8.04_to_work_perfectly?s=sound#audio_after_suspend_resume

Cheers