If root can do something a user can’t then it’s most likely a wrong permission or settings.
I recommend that you check your user is in the audio group.
To do this start YaST->Security and Users->User and Group Management.
Select your user and click edit.
Go to the “Details” tab and on your right you’ll see a list with groups.
Select both audio and video.
I’ve tried and sound works now.But I can’t control volume.There is no icon for it in applet.Also sound doesn’t work at times.My problem is going on.Both sound and wireless don’t work.Besides everything is opening very slow.
To start a volume controller in KDE just start kmix.
I’m not sure how it’s called under GNOME.
But if I’m not mistaking you just right-click on your panel and select “Add to panel”.
A new window will appear, from there select an applet called “volume controller” (or something like that).