Event sounds absent - openSUSE 11.1 KDE 3.5.1



Hello,

i am a relativ beginner in linux but not afraid of trying new
things, reading manuals etc., but this problem i don't have any
idea.

Installed is Linux 2.6.27.29.-0.1-defaultx86_64,
openSUSE 11.1 - KDE 3.5.1.

When i boot i never hear any sound, also when i click on
icons, open programs and so on, no event sounds. (email
coming in, error ... )

But i can hear music or sound in videos and all streaming media in
the internet.

I notice also that oftenly the sound "disappears", so i have to
reconfigure the soundcard, either with YaST->material->sound where
i see: card "MCP51 High Definition Audio" non configured.
I go on "modify... and so on" and sound come back.

Or i launch as superuser in command mode:

alsaconf (configuration works), and than
alsactl store

After one of theses manipulations the sound works again, but only
the sound for hearing music & video.
The system-sounds never work.

Somewhere in the deepness of configuration i found activation and
inactivation of system sounds (i forgot where) but the different
choices never changed anything.

Annother information perhaps important for you:

in the /ect/sysconfig -> Hardware -> Soundcard
i have the following choices:

LOAD_SEQUENCER yes
SOUNDFONT_FILES empty
LOAD_OSS_EMUS_MODULES yes
LOAD_OSS_SEQ_MODULE no
PULSEAUDIO_ENABLE no

Do you have an idea what i can try ?

Thanks
.