https://eubnara.github.io/tags/kde/Recent content in Kde on EUB's second brainHugo -- 0.163.3en-usSat, 20 Jun 2026 18:30:00 +0900https://eubnara.github.io/computer-science/fcitx5-kde-plasma-67/Sat, 20 Jun 2026 18:30:00 +0900https://eubnara.github.io/computer-science/fcitx5-kde-plasma-67/<h2 id="symptom">Symptom</h2> <p>After <code>pkcon update</code> on KDE Neon (Plasma 6.7, KWin 6.7.0):</p> <ul> <li>Korean input works</li> <li>Shift/Ctrl modifier keys break in some apps <ul> <li><code>Shift + -</code> does not produce <code>_</code> (underscore)</li> <li><code>Ctrl + a</code> acts as plain <code>a</code></li> <li>But <code>Shift + ㅂ → ㅃ</code> (double consonant) works fine</li> </ul> </li> <li>Disabling fcitx5 fixes modifier keys → input method is the culprit</li> </ul> <h2 id="root-cause-version-skew">Root cause: version skew</h2> <table> <thead> <tr> <th>Component</th> <th>Version</th> <th>Status</th> </tr> </thead> <tbody> <tr> <td>apt fcitx5</td> <td>5.1.7</td> <td>Too old</td> </tr> <tr> <td>KWin</td> <td>6.7.0</td> <td>Too new</td> </tr> </tbody> </table> <p>Fcitx processes keys in two ways:</p>