I got the error of xdg-desktop-portal-kde in the journal log.
xdg-desktop-portal-kde[1340]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.
systemd-coredump[1364]: [🡕] Process 1340 (xdg-desktop-por) of user 963 dumped core.
There is a known issue: here
Solution:
- If you do not use
flatpak, then just removexdg-desktop-portalandxdg-desktop-portal-kde.
OR - If you use
flatpak, then need to manually runsystemctl --user restart plasma-xdg-desktop-portal-kdeafter every reboot or login.
However, some applications e.g. kcolorchooser does not work without xdg-desktop-portal
The issue is caused by missing the Qt plattform plugin “xcb” or “wayland” for /usr/lib/xdg-desktop-portal-kde
xdg-desktop-portal-kde[1352]: qt.qpa.xcb: could not connect to display
audit[1352]: ANOM_ABEND auid=963 uid=963 gid=963 ses=1 subj=unconfined pid=1352 comm="xdg-desktop-por" exe="/usr/lib/xdg-desktop-portal-kde" sig=6 res=1
xdg-desktop-portal-kde[1352]: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.