SUMMARY When running under wayland a QML application lacks its window decorations when run against runtime 5.12. I first noticed it with the flatpak of elisa, https://github.com/flathub/org.kde.elisa/issues/6 but I also tested with a minimal qml file using qmlscene and it also lacked window decorations My minimal qml file import QtQuick 2.0 import org.kde.plasma.components 2.0 as PlasmaComponents Text { id: helloText color: "#0ff" text: "hello" } I launched the flatpak with "flatpak --devel run --command=bash org.kde.elisa" And run in the flatpak with "qmlscene hello.qml" or "qmlscene -platform wayland hello.qml" I have no window decorations. Using -platform xcb in the container works. And -platform wayland works outside the container (Debian Testing) If I downgrade elisa to a version using the 5.11 flatpack the I do get window decorations even when using -platform wayland. I would like window decorations to be available. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Debian Testing (available in About System) KDE Plasma Version: 5.14.5 KDE Frameworks Version: 5.54.0 Qt Version: 5.11.3 The elisa flatpak from flathub. This version works 0f24374c81c606093c8ca8ad3766c663a55e882a005a52a4051971f38c749963 This version doesn't work. 707a83bcff07a77e300621514b303a43d42e93c3a555979a9b80ecb4892a2e86
It seems like it's an issue in mutter? https://gitlab.gnome.org/GNOME/mutter/issues/199 https://codereview.qt-project.org/#/c/231227/
(In reply to Aleix Pol from comment #1) > It seems like it's an issue in mutter? > https://gitlab.gnome.org/GNOME/mutter/issues/199 > https://codereview.qt-project.org/#/c/231227/ Are you sure its a mutter issue? My host is running kwin_wayland ps auxw | grep kwin diane 21984 5.3 0.9 3241200 162196 tty4 Sl+ 09:20 2:20 /usr/bin/kwin_wayland --xwayland --libinput --exit-with-session=/usr/lib/x86_64-linux-gnu/libexec/startplasma GNOME_SHELL isn't defined and all my XDG settings are pointing at KDE so the changes in https://codereview.qt-project.org/#/c/231227/ shouldn't be activated? I don't know about the double buffering problem though. env | grep XDG XDG_SESSION_PATH=/org/freedesktop/DisplayManager/Session3 XDG_SEAT=seat0 XDG_SESSION_DESKTOP=KDE XDG_SESSION_TYPE=wayland XDG_CURRENT_DESKTOP=KDE XDG_SEAT_PATH=/org/freedesktop/DisplayManager/Seat0 XDG_SESSION_CLASS=user XDG_VTNR=4 XDG_SESSION_ID=29 And I tried looking through gdb's info sharedlibraries for the elisa process and couldn't find any reference to libmutter. I tried dolphin from flathub 74b2d7b235a623ea8dd5bebdfb6c9d1c44b5365c2d1811be52b6218ee15c1953 and it had no decorations as well. I thought kontact worked, but I just remembered we forced it to use xcb because WebKit was broken under wayland.
I'm using kwin_wayland (master) too and I don't have this issue.
Looks like I need to try a newer kwin. Thanks for the hint.