I have same condition with u but i had fixed it Fedora 4 set the sound mute as default. pls use kmix to on it & pls disable the External Amplifier also . Thanks -- 愿您永远幸福，快乐和安详 Happy & Healthy Always ! ^_^ ! 个人和佛学网页 Homepage:ceyong.alturl.com ICQ:16994867/ Yahoo Messenger ID:ceyong MSN Messenger:ceyong at hotmail.com