Thx everyone. i managed to solve the problem.what i did is to download the latest alsa,inlcuding diver,lib,utlity then install all,lastly restart the linux. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listman.redhat.com/archives/fedora-list/attachments/20050530/871427b8/attachment-0001.htm>