Comment # 10 on bug 896933 from Wolfgang Bauer

(In reply to Luca D'Amico from comment #9)
> Thank you Wolfgang Bauer. I've intalled your rpm and now it seems ok.
Thanks for the confirmation.

> I've a new slider called "Sounds of events" (or something similar), that is
> always present, is this correct?
Yes.
Its purpose is to allow you to control the volume of event notifications, i.e.
the sounds that are played when a warning dialog pops up, when you try to close
a dolphin/konqueror window with more than one tab, and so on.

openSUSE removed this slider with a patch since 13.1 as it apparently didn't
work at all back then and the whole event notification volume control caused
problems with PulseAudio (i.e. raising the overall volume to 100% whenever a
notification was played).
Unfortunately, removing this slider apparently causes that other slider for the
volume feedback to appear whenever you move the volume slider, i.e. a volume
feedback sound is played. (KMix does show a new slider whenever an application
is playing sound, this allows to control the volume for each application
separately)

These other problems seem to be fixed now upstream, so there's no reason any
more to remove that anyway.

A side-note: this "Volume Feedback" was disabled by default in 13.1/KDE 4.11.
So it was no real problem back then.
Apparently the default has been changed upstream sometime between 4.11 and 4.14
and we haven't noticed. (personally I didn't use PulseAudio at all until two
weeks ago and this is a PulseAudio-only feature)

> By the way, this fix should be included in the next few updates.. I think
> that this will help a lot of people.
It will be included in the next KDE update for 13.2 (KDE Applications 15.04 is
going to be released tomorrow, an openSUSE update will take some time until it
is released though), or it will be released as a separate update if there won't
be a full KDE update any more (and for 13.1 as well).

See also bug#878685...