SUMMARY notification audio volume cursor stays at 0 when you try to set it STEPS TO REPRODUCE i right click on "audio" icon in the systray then i select "audio volume settings" then in "audio volume" i drag the slider of "notification sound" when i release the slider then the slider return to 0 OBSERVED RESULT EXPECTED RESULT the slider stays at the position i set it SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: 5.16.2 KDE Frameworks Version: 5.59.0 Qt Version: 5.13.0 ADDITIONAL INFORMATION opensuse leap 15.1 kde apps 19.04.2
Please close plasmashell, and try setting the notification volume from alternative pulseuadio commands (such as pavucontrol) If this also fails then it's not a plasma bug.
No problem with pavucontrol. But there is a surprise. Now notification sound volume works well! I can set the notification audio volume in audio settings. It seems the object "notification audio volume" is not created and pavucontrol created it or something like that.
*** This bug has been marked as a duplicate of bug 407397 ***