Version:           unspecified (using KDE 4.7.3) 
OS:                Linux

I report this bug to KSystemLog because running KSystemLog is easier way to reproduce it. Sure it's not KSystemLog bug - please reassign it to some more appropriate KDE component. I didn't find right one.

The problem is: any KDE application with root privileges can stole audio-output from PulseAudio that running under user. Sure any not-KDE applcation with root privileges also can do that, but I think there is probably problem in playback notifications machanism design in KDE that making such things possible even when user just click to button that totally unrelated to audio. So in my case it's happen when KDE application playback error-sound. For that this application use ALSA even if ALSA is already in-use by PulseAudio. In result there is no sound in all application that connected with PulseAudio Server so from user point of view sound is stop working just after click to one button.

Reproducible: Always

Steps to Reproduce:
1. Launch KSystemLog, kdesu will ask root password.
2. Enter requested password.
3. Click to the some button on KSystemLog toolbar that will make KSystemLog try to open log that doesn't exist. You can remove or rename some logfile to reproduce this bug but in Kubuntu case there is daemon.log that is always doesn't exist:
4. Press "Daemon's Logs" button.

Actual Results:  
KSystemLog playback error sound, display error message, and then sound out of the PulseAudio control.

Expected Results:  
Sound doesn't out of the PulseAudio control.

KDE version: 4.7.4.
Kubuntu version: 11.10 x86_64.
PulseAudio is running under user.
daemon.log is doesn't exist.