KDE Plasma requirements
Install xdg-desktop-portal and the KDE backend supplied by your distribution, normally xdg-desktop-portal-kde. Run LinScreen inside the same graphical user session as Plasma.
Verify installation and services
linscreen --version
gtk-launch org.linscreen.LinScreen
systemctl --user status xdg-desktop-portal.service
systemctl --user status xdg-desktop-portal-kde.serviceThe launch check confirms that Plasma can find the desktop ID. The service checks show whether the generic portal and KDE implementation are running.
Test capture modes
linscreen gui
linscreen full --path ~/Pictures/linscreen-full.png
linscreen screen --number 0 --path ~/Pictures/linscreen-monitor.pngTest full-screen and per-monitor capture separately. For a multi-monitor issue, include arrangement, scale factors and resolutions.
Portal chooser behavior
Wayland intentionally restricts direct access to screen contents. Plasma may display a chooser or permission dialog. This is expected and controlled by the desktop security model.
If capture fails
Do not install competing portal backends blindly. Record the active services and environment, then use the troubleshooting procedure. Choose the Debian package for integration or the AppImage for a portable test.
Report reproducible results
Open an issue in the official tracker with Plasma version, distribution, portal backend, session type, monitor topology and output. This beta does not claim support for every Plasma release.