The KDebugSettings Handbook

Laurent Montel (montel kde.org)

Revision KDebugSettings 26.11 (2026-09-21)

Copyright © 2015, 2026 Laurent Montel

KDebugSettings configures which debug messages Qt™ and KDE applications print, without recompiling them.

Table of Contents

1. Introduction

2. Using KDebugSettings

The KDE Application Tab

Severity Levels

The Custom Rules Tab

The Rules Settings With Environment Variable Tab

Saving, Loading and Groups

3. Declaring Categories: the .categories File

Renamed Categories

4. Command Line Options

5. The System Settings Module

6. Credits and License