It’s an old problem. Check this. But still happens on my Debian 12. If I follow the request, type loginctl unlock-session n in tty mode, it works. But I still wonder how to permanently deal with this problem. Here’s the output of ./kscreenlocker_greet --testing:
oct0pu5@debian:/usr/lib/x86_64-linux-gnu/libexec$ ./kscreenlocker_greet --testing
qml: JSON.parse: Parse error
qml: load backend: backend/Scene.qml
INFO main looper started
INFO render looper started
INFO source: /home/oct0pu5/.local/share/Steam/steamapps/workshop/content/431960/2898127928/scene.json
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/backend/Scene.qml:38:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/WindowModel.qml:119:9: Unable to assign [undefined] to QRect
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/main.qml:161: TypeError: Cannot read property 'activity' of undefined
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/main.qml:160: TypeError: Cannot read property 'screenGeometry' of undefined
kf.kirigami: Failed to find a Kirigami platform plugin
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/components/VirtualKeyboard.qml:12:1: Type InputPanel unavailable
qrc:/QtQuick/VirtualKeyboard/content/InputPanel.qml:138:5: Type Keyboard unavailable
qrc:/QtQuick/VirtualKeyboard/content/components/Keyboard.qml:38:1: module "QtQuick.VirtualKeyboard.Plugins" is not installed
Locked at 1739420426
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/WindowModel.qml:119:9: Unable to assign [undefined] to QRect
qml: JSON.parse: Parse error
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/main.qml:161: TypeError: Cannot read property 'activity' of undefined
file:///home/oct0pu5/.local/share/plasma/wallpapers/com.github.casout.wallpaperEngineKde/contents/ui/main.qml:160: TypeError: Cannot read property 'screenGeometry' of undefined
QProcess: Destroyed while process ("/bin/sh") is still running.
INFO gl: OpenGL version 4.6 loaded
INFO gl: OpenGL vendor string: Intel
INFO gl: external tex using optimal tiling
INFO set swapchain image size: 1862x1047
INFO vulkan device: Intel(R) Graphics (RPL-S)
qml: ----python helper connected----
INFO new buffer block(0x7fbed4381710), size: 2097152, index: 0 / 1
INFO new buffer block(0x7fbed4381800), size: 2097152, index: 0 / 1
INFO loading scene: /home/oct0pu5/.local/share/Steam/steamapps/workshop/content/431960/2898127928/scene.json
INFO muted, not init sound device
INFO pkg version: PKGV0018
INFO cache folder: /home/oct0pu5/.cache/wescene-renderer
INFO read json "type" not a key at FromJson(WPParticleObject.cpp:11)
kf.kio.core: Malformed JSON protocol file for protocol: "trash" , number of the ExtraNames fields should match the number of ExtraTypes fields
INFO read json "type" not a key at FromJson(WPParticleObject.cpp:11)
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
INFO new buffer block(0x7fbed4381800), size: 3200000, index: 1 / 2
INFO increase buffer size: 3200000
INFO new buffer block(0x7fbed4381800), size: 3200000, index: 2 / 3
INFO increase buffer size: 3200000
INFO new buffer block(0x7fbed4381800), size: 2097152, index: 3 / 4
INFO increase buffer size: 2097152
wekde.scene: receive external texture(1862x1047) from fd: 72
qml: backend scene first frame
wekde.scene: receive external texture(1862x1047) from fd: 69
wekde.scene: receive external texture(1862x1047) from fd: 68
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/MediaControls.qml:82:9: QML Image: Blocked request.
I have installed qml-module-qtquick-virtualkeyboard, libwayland-client0 and libwayland-cursor0 so now I am very confused about what the situation is.