no sound ??

I just installed 11.2 kde desktop
everything works fine except no sound when I play youtube and watch movie online
worked with my audio and video files in my computer only
appreciate it

I assume thus basic sound works.

I assume you are using the firefox browser to try and play these videos?

Is your openSUSE install a 32-bit or 64-bit openSUSE ?

Firefox uses flash-player to play Youtube videos. Note that for some bizarre reason, the PCM volume control can be dynamically set to 0 volume, when a multimedia application starts. So try again to play a youtube video, and this time check your mixer (kmix) and move the PCM volume levels up if they had been moved down.

Starting tomorrow I will be away for 2 weeks and will likely have no forum access.