Nicolas Bercher via trinity-users wrote:

For those interested in the solution:

I identified that the annoying sound notification file is KDE_Chimes_2.ogg (from /opt/trinity/share/sounds/).

Your install is broken if you cannot configure notifications from trinity control center (TCC), see .pngs.

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Now, *applications such as kpdf and konqueror cannot be configured*

anymore, or only partly.

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konqueror:  - Basic preferences like "View Mode" (tree view, etc.)

Setting defult is/was broken, need to use TCC (see .png)

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- Menu Settings / Configure Konqueror : I got an empty window

Broken install, should also be able to do through TCC (see .png)